Back Pain to Leg Pain Video: Disc or Sciatica?

Back pain to leg pain describes one pattern rather than two problems. When a nerve root is irritated where it leaves the spine, the symptom is registered further down the limb, which is why a calf can hurt while the back itself feels almost normal.

In this recorded talk, Yama Zafer, D.C., explains how a spinal disc is built and how it wears, how sitting, bending and sleep change the pressure inside it, how a damaged disc can irritate the nerves that form the sciatic nerve, and which exercises, stretches and habits he advises against when a disc is damaged.

This video guide to back pain that spreads to the leg, and whether a disc problem or sciatica is behind it, is published by Chiropractic Specialty Center, Bukit Damansara (KL) main center: WhatsApp+60 17 269 1873 Call+603 2093 1000

Back Pain to Leg Pain: Key Takeaways

PointWhat to know

What the talk covers

A recorded talk by Yama Zafer, D.C., on how spinal discs are built, why they wear, how sitting, bending and sleep load them, how a damaged disc can irritate the nerves that form the sciatic nerve, and what he advises against.

How a disc is built

Each disc has a soft, water-rich center, the nucleus pulposus, held by rings of tough fibers, the annulus fibrosus, which also bind one vertebra to the next.

Damage without pain

Disc degeneration often develops for years without pain, and disc changes are common on the scans of people with no back pain at all [1].

Pressure and nutrition

A disc draws fluid and nutrients through the bone above and below it; in the talk, long sitting and bending keep the pressure inside it high, while lying down lowers it.

Sleep

Sleep is when disc pressure falls and fluid returns; he advises sleeping on the side with the spine in one line, or on the back with support under the knees and the neck.

Sciatica

Sciatica describes an irritated sciatic nerve rather than a diagnosis; in his experience, some disc involvement has been present in every case he has seen.

What he advises against

With a damaged disc: forceful cracking and twisting, deadlifts, swimming laps, general stretching and hard hamstring pulls, hot packs on an inflamed area, and yoga; surgery is the last option after conservative care.

Back Pain to Leg Pain: Page Guide & Key Sections

Quick Answer: Is Back Pain to Leg Pain a Disc Problem or Sciatica?

Back-to-leg symptoms may come from several lower-back structures. A disc problem refers to the spinal disc itself. Sciatica refers to a symptom pattern that follows the sciatic nerve pathway.

A slipped disc, disc bulge, herniated disc, disc prolapse, ruptured disc, or spinal disc degeneration may irritate nearby nerve roots. When those nerve roots contribute to the sciatic nerve, symptoms may travel into the buttock, thigh, calf, or foot.

So the question is not always “disc or sciatica.” A disc problem is a common reason sciatica develops.

Key Moments in This Back Pain to Leg Pain Video

Use these timestamps to move through the talk topic by topic:

  • 00:00 Spinal Disc and Neck Problems Are Common
  • 02:43 The Spine’s Three Regions and Its Nerves
  • 04:06 What the Spine Does
  • 06:22 How a Spinal Disc Is Built
  • 09:07 The Disc as a Shock Absorber
  • 13:10 What Sitting Does to the Lower Back
  • 15:53 Disc Degeneration Can Start Early
  • 18:30 A Healthy Disc and a Damaged Disc
  • 20:50 Why a Torn Disc Hurts
  • 25:30 How a Disc Feeds, and Why Sleep Matters
  • 28:49 The Stages of Disc Damage
  • 34:53 Disc Damage Without Pain
  • 38:00 Pressure Inside the Disc
  • 42:30 How the Disc Makes Its Own Building Blocks
  • 45:12 Disc Pressure, Sleep and Pain as a Warning
  • 51:05 Sleep Position, Disc Height and L4-L5
  • 57:13 Deadlifts, the Ligamentum Flavum and MRI
  • 1:04:12 Activities to Avoid With a Damaged Disc
  • 1:12:46 Sciatica: A Symptom, Not a Diagnosis
  • 1:21:40 Stretching the Psoas, and Why Balance Matters
  • 1:29:42 Balance Boards, and Forceful Methods to Avoid
  • 1:33:12 Cracking, Surgery and Conservative Care
  • 1:38:12 Neck Care, Pillows and Sleep Posture
  • 1:42:40 Golf and the Spine

Arranging an Assessment for Back Pain That Travels to the Leg

To arrange an assessment for back pain that travels into the leg, see the Bukit Damansara contact page and the Bandar Sri Damansara contact page, or call either center directly:

The first visit starts with your history and an examination of the lower back, pelvis and legs, tracing how far the symptoms travel and checking the nerves, before deciding whether an MRI is needed and before any care is discussed.

Find both centers on Google Maps: Bukit Damansara (KL, main center) and Bandar Sri Damansara.

What This Video Helps You Understand

This video explains why symptoms can start in the lower back and travel into the leg. It looks at the way spinal discs handle pressure, how nerves leave the spine, and why sitting, posture, sleep, bending, and rotation may influence back-to-leg patterns.

The video also explains why a person may have spinal disc degeneration or a disc finding on MRI before symptoms become clear. Disc findings need to be understood together with location, nerve involvement, daily habits, and how symptoms behave.

The main educational focus is the relationship between the lower-back discs and the sciatic nerve pathway. The video does not reduce every leg symptom to one cause. Instead, it explains why disc structure, nerve space, spinal loading, and surrounding tissues need to be considered together.

When back pain travels into the leg and is accompanied by new or worsening numbness around your genitals, between your genitals and anus, or around your anus, get urgent medical attention: a thorough assessment by a competent clinician the same day. New difficulty passing urine needs the same urgent assessment, even when bladder and bowel control have not changed, and so does any loss of that control. These symptoms can arise for several reasons. Some may call for an invasive procedure, but the purpose of assessment is to identify the cause and appropriate care; it does not mean surgery is automatically required.

Main Points Covered in the Video

  • Back-to-leg symptoms may involve a disc, nerve root, joint, muscle, ligament, or more than one structure.
  • Sciatica describes a nerve pathway pattern, not one single diagnosis.
  • Sitting and forward posture can increase lower-back disc pressure.
  • Spinal disc degeneration may develop slowly before symptoms are obvious.
  • Disc bulge, herniation, prolapse, rupture, and extrusion describe different disc-related findings.
  • Sleep position and rest can affect spinal loading and disc pressure.
  • Exercise and stretching should match the symptom pattern, especially when nerve irritation is suspected.

If this video was useful, you may also like our pages on leg pain.

Back Pain to Leg Pain Talk: Chapter Summaries

The full talk, recorded live, plays in the video above. Each chapter below opens to a summary of that part of the talk, with its start time and a short quote from Yama Zafer, D.C. The video is also on YouTube, alongside the rest of the Chiropractic Specialty Center channel.

Spinal Disc and Neck Problems Are Common (00:00)

Summary: Yama Zafer, D.C., opens the talk by noting that spinal disc problems are common and that neck problems range from mild stiffness to discomfort running down the arms, burning between the shoulder blades and, at times, weakness in the legs. He points out that people are living longer without always living healthier, and sets out what the talk covers: the spine, the discs, and what to do and what to avoid.

Summary: Using a spine model, he shows the three regions of the spine: the neck, the upper and mid back and the lower back, above the sacrum and pelvis. The nerves that leave the spine between the vertebrae need enough room, which is why the space around them matters so much in the lumbar spine when symptoms travel into the buttock or leg.

In his words: “Now what makes this structure very important are these yellow out-pokings, and these are the nerves, and those nerves need sufficient room.”

Summary: The spine protects the spinal cord and forms the pathway through which the nerves connect the body and the brain. He explains that much of the spine’s movement comes from the discs, not only the joints, which is why disc problems matter, and he cautions against advice from people online who claim to be experts without the training.

In his words: “We live in a society where anyone and their cousin can post anything on the internet and claim to be an expert.”

Summary: A spinal disc has a gel-like center, the nucleus pulposus, surrounded by tough, criss-crossed rings of fibers, the annulus fibrosus, that let it expand and contract like a sponge and a spring. The annulus protects the nucleus much as the ribcage protects the heart and lungs, and it binds one vertebra to the next, which is why it is often called a ligament. Lifestyle and poor habits damage both parts.

In his words: “It is not just the annulus that gets damaged, it's the nucleus that gets damaged. And what damages it is our lifestyle, our poor habits.”

Summary: The disc, he explains, does much of the work when the spine bends and twists, and it absorbs shock that would otherwise reach the joints and the bone. A disc depends on healthy bone above and below it for its supply. Of all daily habits, he names sleep and posture as the two to be most mindful of, alongside diet, nutrition and exercise.

In his words: “Number one, that you sleep. Number two is your posture.”

Summary: Axial loading is the weight of the upper body pressing straight down through the spine. Even in a good sitting posture, that weight bears down on the joints and discs of the lower back, and leaning forward over a laptop or desk adds to the load. He uses a chair to show how the weight travels from one segment to the next.

In his words: “When you sit upright, the weight of the body comes down and it comes down crushing on our spinal joints and on our discs.”

Summary: Degeneration is part of life and does not have to mean pain: changes can build in the discs, joints, muscles and ligaments while the body tolerates them. He sees many patients whose symptoms begin in their late teens and early twenties, and the youngest disc patient he describes was a seven-year-old girl. The same applies to the neck, he adds, where disc damage can also be present without symptoms.

In his words: “Degeneration is part of life, but it doesn't mean that the moment you degenerate, you'll have pain.”

Summary: Side by side, a healthy disc shows an oval nucleus held in place by intact fibers, while a damaged disc shows torn fibers and a nucleus that has shifted toward the nerve. Disc material tends to move backward because the posterior longitudinal ligament behind the disc is thinner than the anterior one in front, so the back of the disc is its weaker side.

In his words: “Healthy disc, beautiful nucleus, oval shape, annulus, perfectly bound, held together, nerve happy, nothing compressing it.”

Summary: Only the outer layer of a healthy disc has pain-sensing nerve fibers. When fibers tear and the disc degenerates, nerves and small blood vessels grow inward, often while there is still no pain, and the disc can become more sensitive: turning in bed, coughing or even laughing may then hurt. On an MRI, a degenerated disc loses the clear border between nucleus and annulus because its water content changes.

In his words: “That ingrowth of nerve happens when it's asymptomatic, 'cause the body tries to fix itself.”

Summary: A disc draws in fluid and nutrients through the endplates of the bone above and below it, a process called imbibition, and this works best when pressure inside the disc is low, as it is during sleep. That is why people are slightly taller in the morning. He also explains why radiology reports often call any disc change a bulge: once a disc degenerates, the nucleus and the annulus can no longer be told apart on the scan.

In his words: “Did you know that you're taller in the mornings than you are in the evenings? Which is why sleep is important.”

Summary: He walks through the stages: a bulge, where the fibers weaken and swell but the nucleus stays in place; a protrusion or prolapse; a herniation, also called a rupture; an extrusion; fragmentation; and sequestration, where a piece breaks away. The bulging disc vs herniated disc video covers the same terms. Small tears can be missed on an MRI, and a damaged disc can worsen quickly or over years.

In his words: “Once you have a damaged disc, it can go rapidly or it can take years.”

Summary: The most common symptom of disc damage, he says, is none at all: changes seen on a scan have often been there for years without pain [1]. When a disc in the neck presses on a nerve or the spinal cord, symptoms can include numbness, tingling, burning or weakness in the shoulders, arms and hands, and pressure on the cord can reach as far as the legs. He urges everyone, young and old, to mind their posture and the head-forward position of text neck.

In his words: “Of course, the most common symptom of spinal disc damage is zero.”

Summary: Every tissue in the body is under pressure, and so is the disc. Using a pressure cooker as a comparison, he explains that when pressure inside the disc rises too high, the disc starts to break down from the inside and the nutrients carried in the blood cannot get in. Sitting and bending raise that pressure; rest and sleep lower it.

In his words: “And what makes that pressure drop down is rest, sleeping.”

Summary: Only small molecules such as oxygen, sugar, amino acids and water pass into the disc, so the cells inside it must build everything else themselves. When the pressure stays high, those building blocks are broken down and pushed out while new nutrients are kept from coming in, which is why posture matters for the disc.

In his words: “So the disc has to produce its own building compounds, and it only does it when nutrients are coming in.”

Summary: Disc pressure is lowest when lying down and rises with standing, leaning forward and sitting, he explains, so a job spent sitting all day leaves the disc little chance to rehydrate, and sleep becomes its main opportunity. He advises at least seven to eight hours of uninterrupted sleep, describes pain as a warning system worth listening to, and shows how to support the knees and the neck when sleeping on the back.

In his words: “Pain is not a bad thing. Ignoring pain is bad. Pain tells us what's happening.”

Summary: He advises sleeping on the side with the spine in one line, not half-turned onto the stomach. As a disc loses height, the openings where the nerves leave the spine narrow, the facet joints take more load, and the ligamentum flavum can buckle inward. In his explanation, most forward bending happens at L4-L5, which is why it and L5-S1 are where disc problems are most often found.

In his words: “You have to pay attention to the mechanics, because if you don't understand the mechanics, you'll not know what to do for it.”

Summary: He advises against deadlifts and explains how the ligamentum flavum, an elastic ligament inside the spinal canal, can thicken or buckle and narrow the space for the nerves. An MRI rarely shows exactly where the nucleus sits, so reports often describe a herniation from its shape. A disc, he stresses, can be damaged at any stage with or without pain.

In his words: “Pain is not a yardstick. Pain is a symptom.”

Summary: Using his own knees as an example of damage that gave no warning, he goes through what to avoid with a damaged disc: swimming laps, where walking in water is gentler; yoga, which must be avoided; general stretching and hard hamstring pulls, which can press on the disc; hot packs on an inflamed area; and bending, twisting and lifting in poor postures. Exercise and stretching have to be condition specific and age appropriate.

In his words: “So what may feel good for the muscle is not good for the joint or disc.”

Summary: Sciatica describes an irritated sciatic nerve, the nerve formed from roots of the lower back and sacrum that runs under the buttock and down behind the thigh. It is usually felt on one side, and pain can turn into numbness, tingling and weakness. In his experience, some disc involvement has been present in every case of sciatica he has seen, and the irritated nerve roots also leave the muscles and fascia they supply tense, with trigger points that need attention too.

In his words: “Sciatica is not a muscle issue. It's a nerve issue.”

Summary: He shows a psoas stretch, sitting on a small stool and leaning back, and a quadriceps stretch, with only light hamstring stretching, and stresses that these are not for everyone: people with spondylolisthesis should not do them, and anyone else should check with their own doctor first. He then explains why balance matters as reflexes slow with age and as leg weakness follows a disc problem.

In his words: “So when I recommend these exercises, it's not for everyone.”

Summary: Standing on a rocker or wobble board trains the brain and muscles to steady the body, and he advises doing it in a clinic where someone can catch you. He then turns to care for disc problems, advising against cracking and yanking the spine, and against steroid injections or surgery as a first choice.

In his words: “Exercises, as I mentioned, must be age appropriate, condition specific, and only done when you're ready.”

Summary: Cracking and twisting should not be done on a spine with a damaged disc, even by an experienced chiropractor, and he uses rotary manipulation only when he is sure there is no disc damage. Invasive procedures have their place, but for disc problems surgery should be the last option, after condition-based conservative care, and posture and habits during the rest of the day are part of that care.

In his words: “It has to be condition based and appropriate conservative care. Ones that don't harm.”

Summary: In answer to a question about the neck, he puts lifestyle first: sleeping posture and habits, diet and nutrition, and how a computer workstation is set up. There is no perfect pillow, he says; a rolled towel tied at the ends and placed under the neck can be washed every week, and a pillow with a thin side and a thick side also works.

In his words: “The most important thing is not the treatment. The most important thing is to make lifestyle changes.”

Summary: Asked about golf, he calls it a great sport that is hard on the knees and back when overdone: hit no more than about 50 balls at the range, favor the shorter clubs, swing gently, warm up with easy swings, and avoid bending and twisting stretches.

In his words: “Don't stop, but balance. Don't kill the ball.”

The fees for the first examination and for care at both centers are listed on the chiropractic fees in Kuala Lumpur and physiotherapy price in Kuala Lumpur pages.

Related Spine and Joint Care Approaches

The pages below cover the disc and nerve topics discussed in this talk.

Spinal Disc Topics

Sciatica and Nerve Topics

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Continue With Related Spine and Nerve Videos

The videos below help explain how spinal discs, sciatica, posture habits, chiropractic care, and daily movement can connect with lower-back and leg-related concerns.

FAQs About Back Pain to Leg Pain, Disc, and Sciatica

These questions cover what people most often ask about back pain that travels into the leg: sciatica, slipped discs, sitting, sleep, the activities to avoid and when to get assessed.

Why can a back problem cause pain in the leg?

Nerve roots leave the lower back and join to form the sciatic nerve, which runs through the buttock and down the leg. When a damaged disc, a narrowed opening or irritated tissue presses on one of those roots, the symptom can be felt along the nerve's path, in the buttock, thigh, calf or foot, sometimes with little or no back pain.

Is sciatica the same as a slipped disc?

No. Sciatica describes an irritated sciatic nerve, which is a pattern of symptoms, while a slipped disc is an everyday term for a disc that has bulged or herniated. A slipped disc is a common cause of sciatica, and in the talk Yama Zafer, D.C., explains that some disc involvement has been present in every case of sciatica he has seen.

Can a damaged disc cause no pain at all?

Yes. Disc degeneration often develops for years without symptoms, and a 2015 review by Brinjikji and colleagues found disc changes common on the scans of people with no back pain. In the talk, Yama Zafer, D.C., calls pain a symptom rather than a yardstick, which is why posture and daily habits matter before any pain begins.

Why does sitting matter for the lower back?

Sitting brings the weight of the upper body straight down onto the lower lumbar discs, and leaning forward over a desk or a laptop adds to that load. The talk explains that long hours of sitting keep the pressure inside the discs high, so they have little chance to draw fluid and nutrients back in until the person lies down to rest or sleep.

How does sleep help the spinal discs?

Lying down takes the weight off the spine, so the pressure inside the discs falls and they draw fluid back in, which is why people are slightly taller in the morning. In the talk, Yama Zafer, D.C., advises sleeping on the side with the spine in one line, or on the back with support under the knees and a rolled towel under the neck.

Which activities does the talk advise against with a damaged disc?

With a damaged disc, the talk advises against forceful cracking and twisting of the spine, deep bending and twisting, deadlifts, swimming laps, general stretching and hard hamstring pulls, hot packs on an inflamed area, and yoga, which must be avoided. Walking in water is suggested instead of swimming, and any exercise has to be condition specific and age appropriate.

Is surgery needed when a disc causes leg pain?

In the talk, Yama Zafer, D.C., describes surgery as the last option for disc problems, considered after condition-based conservative care has been tried, while acknowledging that invasive procedures have their place and that some cases do go on to a surgeon. Conservative care, in his words, has to be condition based and appropriate, and it includes posture and habits through the day.

When does back pain that travels to the leg need urgent attention?

New numbness around the genitals or anus, new difficulty passing urine, or loss of bladder or bowel control needs urgent medical attention the same day. Leg weakness that keeps getting worse should not be ignored either: it calls for a careful assessment by a competent provider, and conservative care can still be a reasonable route for as long as it keeps producing results.

Why does the talk include balance training?

Disc problems can leave the legs weaker, and balance matters more with age because reflexes slow and a fall becomes more likely. Yama Zafer, D.C., demonstrates a rocker board and a wobble board, which train the brain and muscles to steady the body, and advises using them in a clinical setting where someone can catch you if you lose your balance.

References

The source below is the review cited on this page.

  1. Brinjikji W, Luetmer PH, Comstock B, et al. Systematic literature review of imaging features of spinal degeneration in asymptomatic populations. AJNR Am J Neuroradiol. 2015;36(4):811-816.

This review describes imaging findings of spinal degeneration in people without back pain in general. It does not evaluate care at Chiropractic Specialty Center.

Disclaimer

This video is for general education only. It is not a diagnosis, medical advice, or a replacement for an in-person assessment by a qualified healthcare provider.

Back-to-leg symptoms may involve spinal discs, joints, muscles, ligaments, nerves, posture habits, sitting habits, sleep position, daily loading, prior injury, or other health factors. Assessment is important when symptoms persist, worsen, spread into the leg, or occur with numbness, tingling, weakness, balance changes, bladder or bowel changes, fever, recent injury, or unexplained weight loss.

The information on this page is intended to help viewers understand general terms such as slipped disc, disc bulge, herniated disc, disc prolapse, ruptured disc, spinal disc degeneration, sciatica, and nerve irritation. It should not be used to self-diagnose or to choose exercises.

The Author of Back Pain to Leg Pain Video: Disc or Sciatica?

Back Pain to Leg Pain Video: Disc or Sciatica? was written by Yama Zafer, D.C., who has 30+ years in chiropractic and physiotherapy and founded Chiropractic Specialty Center in Kuala Lumpur in 2006.

Last Updated: Back Pain to Leg Pain Video: Disc or Sciatica?

Back Pain to Leg Pain Video: Disc or Sciatica? was last reviewed and updated on October 4, 2026.