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What’s Causing My Lower Back Pain?

Oct 26, 2026 | Back Pain

The short answer

The most common causes of lower back pain are abnormal spinal structural alignment, strained muscles and ligaments, irritated spinal joints, disc problems, and nerve irritation. Posture, long hours of sitting, weak core and hip muscles, and stress can all make these problems more likely or slower to settle. Most lower back pain is mechanical, which means it comes from how the spine and the tissues around it move and carry load.

Lower back pain is one of the leading reasons adults miss work and see a provider. According to the World Health Organization, it is the single leading cause of disability worldwide. Even so, most cases are not caused by serious disease, and many improve with the right care. However, without proper care, the risk of this becoming a chronic condition is extremely high.

At Innovative Nerve & Joint Centers, we help patients understand the causes of lower back pain so treatment targets the source instead of only quieting symptoms.

Is My Back Pain Coming From a Muscle, Joint, Disc, or Ligament?

Each structure tends to produce its own pattern of pain, although more than one is often involved.

  • Muscle and ligament strain: A dull, achy pain across the low back, often after lifting, twisting, or an unusually active day. It usually feels tight and may spasm.
  • Facet joint irritation: The small joints along the back of the spine can become stiff or inflamed. Pain is often worse when leaning backward, twisting, or standing for long periods.
  • Disc problems: A bulging or herniated disc can cause pain that is worse with sitting and bending forward. If it presses on a nerve, pain may travel into the buttock or leg.
  • Sacroiliac (SI) joint pain: Pain low on one side, near the dimple at the top of the buttock, often worse with stairs or rolling over in bed.
  • Abnormal structural alignment: Plays a role in all of these and must be addressed as well.

Sorting out which structure is involved is a key part of a back pain evaluation, because each one responds best to different care.

Why Does My Lower Back Pain Keep Coming Back?

Back pain often returns because the conditions that caused it never changed. Pain may settle with rest or medication, but weak core and hip muscles, stiff joints, or poor movement habits leave the spine just as vulnerable as before.

Research shows that recurrence is common after a first episode of low back pain. Rebuilding strength, improving how you bend and lift, and restoring normal movement are some of the most effective ways to lower that risk.

Can Sitting Cause Lower Back Pain?

Long periods of sitting can contribute. Sitting increases pressure on the discs compared with standing, and slouching shifts load onto the ligaments at the back of the spine. Over hours, that can leave the low back stiff and sore.

The bigger problem is usually staying in one position too long. Changing positions often, standing up every 30 to 60 minutes, and setting up your desk well can make a noticeable difference.

Can Stress Cause Back Pain?

Stress does not damage the spine, but it can make back pain worse. Stress tends to increase muscle tension, interrupt sleep, and make the nervous system more sensitive to pain. People under significant stress also tend to recover from back pain more slowly.

That is why good care looks at sleep, activity, and daily routines along with the spine itself.

What Else Can Cause Lower Back Pain?

Less commonly, low back pain comes from conditions such as spinal stenosis, degenerative disc disease, or a stress fracture. Rarely, back pain is a sign of infection, kidney problems, or other conditions outside the spine.

Pain that comes with fever, unexplained weight loss, numbness in the groin or inner thighs, or changes in bladder or bowel control needs prompt medical attention.

Frequently Asked Questions About the Causes of Lower Back Pain

What Is the Most Common Cause of Lower Back Pain?

Muscle and ligament strain is one of the most common causes. Many cases are labeled “nonspecific low back pain,” which means the cause can’t be identified. While these cases may still respond to treatment, we find that identifying the underlying cause and addressing it gives the best outcomes.

Can a Weak Core Cause Back Pain?

Weak core and hip muscles can leave the spine less supported, which increases stress on the joints and discs. Strengthening these muscles is a common part of care.

Can Sleeping Position Cause Back Pain?

It can contribute. A mattress that is too soft or a position that twists the spine may leave you stiff in the morning.

Is Back Pain a Normal Part of Aging?

Spinal changes are common with age, but pain is not inevitable. Many older adults with changes on imaging have little or no pain.

When Should I See Someone for Lower Back Pain?

Get evaluated if pain lasts more than a few weeks, keeps coming back, travels down the leg, or limits sleep, work, or activity. Seek urgent care for the warning signs listed above. Immediately seek medical attention if you have numbness in your inner thighs or bowel or bladder issues. These are signs of a medical emergency.

Find the Cause of Your Lower Back Pain in Downers Grove

Lower back pain has many possible causes, and the right treatment depends on finding yours. At Innovative Nerve & Joint Centers, Dr. Paul Fisher, whose clinical training includes Department of Defense hospital rotations in orthopedic surgery, radiology, and physical medicine and rehabilitation, evaluates how your spine, hips, and core work together.

From there, we build a personalized, non-invasive back pain treatment plan. Contact our Downers Grove office at (312) 988-9655 to schedule your evaluation.