Why does my lower back hurt when sitting for too long?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Why does sitting for long periods cause lower back pain? Prolonged sitting places excessive pressure on your spinal discs, tightens hip flexors, and weakens core and gluteal muscles that support your lower back. Poor posture while seated further strains the lumbar spine, often leading to stiffness, aching, or sharp pain.

If your lower back pain is persistent or worsening, it's worth understanding the underlying cause before it interferes with daily life. A free, instant, online symptom check can help you identify possible conditions, assess urgency, and guide your next steps—whether that's simple stretches at home or seeing a doctor.

Reviewed for medical accuracy: 07/15/2026

Important Next Steps

Discover causes of back pain after sitting Learn if back pain needs urgent care Find out what worsening back pain means See OTC options for back pain relief Find a doctor for back pain Discover home remedies for back pain Understand if back pain suggests serious illness

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Explanation

When you sit for a long time, it can cause your lower back to hurt. This happens because sitting puts pressure on your spine and the muscles around it. Over time, this pressure can make your muscles tired and sore.

Why Sitting Hurts Your Back

Pressure on the Spine: Sitting for too long can increase pressure on your spine, which can lead to discomfort and pain.
Muscle Fatigue: The muscles that support your back can get tired from holding the same position for too long, causing soreness.

Tips to Help

Take Breaks: Try to stand up and move around every 30 minutes.
Stretch: Do simple stretches to keep your back muscles loose.
Check Your Symptoms: If your back pain persists or worsens, you can use a free AI symptom checker to better understand what might be causing your discomfort.

By understanding how sitting affects your back, you can take steps to feel better and avoid pain.

(References)

Park JH, & Srinivasan D. (2021). The effects of prolonged sitting, standing, and an .... Ergonomics, 33565921.
De Carvalho D, Greene R, Swab M, & Godwin M. (2020). Does objectively measured prolonged standing for desk .... Work (Reading, Mass.), 33074206.
Baker R, Coenen P, Howie E, Williamson A, & Straker L. (2018). The Short Term Musculoskeletal and Cognitive Effects .... International journal of environmental research and public health, 30087262.

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