Herniated disc vs. spinal stenosis: the symptoms differ when you walk
A 34-year-old whose leg tingles while sitting, and a 67-year-old whose legs grow heavy while walking. Following each person's day, we look at how their symptom patterns differ.
Sungjong Park, D.C. · October 2026 · Reading time 5 minA and B in this article are fictional cases reconstructed from a range of situations and are not real people. This article provides general health information and does not replace an individual diagnosis.
Two people may both say their leg is numb, but when it happens differs from person to person. One person sits through a long meeting and feels a tingling from the buttock down to the calf; another can't make it once around the block before looking for a bench. The first is a picture often seen with a herniated lumbar disc, the second with spinal stenosis. Putting the days of two fictional people side by side makes the difference much clearer.
A, a 34-year-old office worker whose leg tingles more the longer they sit
A sits in front of a monitor for more than nine hours a day. Their lower back felt stiff after lifting boxes during a move a few weeks ago, and lately there is an electric-like tingling from the right buttock down the back of the thigh to the outside of the calf. It is especially bad when afternoon meetings run long. Once, a single sneeze sent a jolt all the way down their leg.
This story contains several clues that point toward a herniated disc. When the nucleus, the soft center of the disc that cushions the vertebrae, pushes out and presses on or inflames a nearby nerve root, it causes pain that runs down the leg. This is commonly called sciatica. It usually affects one leg.
Sitting, coughing, sneezing, and straining raise the pressure inside the disc. That is why, as with A, leg symptoms often stand out during long periods of sitting or when sneezing. According to review literature, herniated discs are common between the ages of 20 and 50, and about 95% of lumbar disc herniations occur at the two lowest levels of the lower back (L4-5, L5-S1).
B, 67, who has to stop and stand still while walking
B used to love walking in the park every morning. But for the past year, after about 10 minutes of walking, both buttocks and legs become heavy and numb. After resting on a bench for a few minutes, B can walk again. Sitting on the sofa or lying down at home is not very uncomfortable. Strangely, B says pushing a cart at the supermarket is fine even for a long time.
Inside the spine is a passage that the nerves run through, called the spinal canal. As we age, bones, ligaments, and joints thicken and this passage narrows. This is spinal stenosis. A review in American Family Physician describes it as a common cause of chronic back pain, especially in people over 50.
Three things stand out in B's day: symptoms worsen with walking or standing, ease with sitting or bending forward, and affect both legs. This pattern of having to stop and rest while walking is called neurogenic claudication. Bending slightly forward widens the spinal canal a little, which is why someone may manage to walk longer while pushing a cart. Conversely, leaning back often makes it more uncomfortable.
Which pattern is closer to mine?
The list below is not a diagnosis. Think of it as notes for organizing your symptoms before you see a doctor. Keeping a record for about a week will make your appointment much more productive.
- [A-type pattern] Leg pain gets worse when I sit for a long time
- [A-type pattern] Coughing or sneezing sends a jolt down my leg
- [A-type pattern] Symptoms are mainly in one leg
- [B-type pattern] After walking for a while, my legs feel heavy and numb and I have to rest
- [B-type pattern] Sitting or bending forward quickly makes it better
- [B-type pattern] I can walk longer when leaning forward to push a cart
- [Record for both] How many minutes of walking before symptoms start, and how many minutes of rest before they settle
What is checked in the treatment room
For both people, evaluation begins with a detailed history and a neurological examination. This looks at whether skin sensation is reduced, whether the strength to lift the ankle or big toe is weaker, and whether knee and ankle reflexes are diminished. These are clues to which nerve root may be involved.
In a case like A's, a common test is to raise the straightened leg while lying down to see whether it reproduces the usual leg pain (the straight leg raise test). A case like B's is a bit trickier. Right after sitting and resting, the exam may look almost normal. So sometimes the person is asked to walk until symptoms appear, and then checked again. Here, how far one can walk before symptoms start and how long one must rest for them to settle become important clues.
Imaging such as MRI is an important tool for confirming either condition, but when to do it is for a specialist to decide. If there are no red flags, the general recommendation in both cases is to start with non-surgical care: education about the condition, adjusting activity levels, exercise, physical therapy, and so on. Many acute disc herniations settle naturally over a few weeks to a few months, and for spinal stenosis, practice guidelines also list non-surgical management as the first choice. From a chiropractic perspective, we also look at which postures and movements change the symptoms.
When not to wait
Whether you're more like A or B, if even one of the signs below is present, this is not the stage to keep recording patterns and watching. Most people go through this without these signs, but if they appear, medical care comes first.
See a doctor first if…
- Difficulty urinating, being unable to urinate, or loss of bladder control
- Being unable to hold stool, or not feeling the urge to have a bowel movement
- Reduced sensation around the genitals, anus, or inner buttocks (saddle area)
- Sciatica in both legs at the same time
- Leg weakness or numbness that is severe and keeps getting worse
- Fever, unexplained weight loss, or pain that gets worse at night
Bladder or bowel problems or saddle-area numbness can be signs of cauda equina syndrome, so go to the emergency room immediately. Weakness that keeps getting worse requires care from a neurosurgeon or orthopedic spine specialist.
This evening, write down each moment your leg went numb, one line at a time. Were you sitting, or were you walking?
This article is for general health information. Everyone's condition is different, so an accurate assessment requires consulting a professional.
