Dismiss Modal

Causes

Possible Causes of Low Back or Leg Pain

Choose a preferred language

The symptoms in your back or leg may be due to pressure on a nerve. This pressure may be caused by a damaged disk or by abnormal bone growth. Either way, you may feel pain, burning, tingling, or numbness. If you have pressure on a nerve that connects to the sciatic nerve, pain may shoot down your leg.

Side view of male figure showing lumbar spine anatomy and sciatic nerve.


Pressure from the disk

Constant wear and tear can weaken a disk over time and cause back pain. The disk can then be damaged by a sudden movement or injury. If its soft center starts to bulge, the disk may press on a nerve. Or the outside of the disk may tear, and the soft center may squeeze through and pinch a nerve.

Top view of lumbar vertebra with damaged disk pressing on nerves.


Pressure from bone

As a disk wears out, the vertebrae right above and below the disk start to touch. This can put pressure on a nerve. Often, abnormal bone (called bone spurs) grows where the vertebrae rub against each other. This can cause the foramen or the spinal canal to narrow (called stenosis) and press against a nerve.

Top view of lumbar vertebra and disk showing bone spur pressing on spinal nerve.


Other causes

Back pain can be caused by many other things. Some of these can be serious. If you have blood flow problems, a history of cancer, or constant pain despite your activity level or position, it's important to see your healthcare provider.

Online Medical Reviewer: Joseph Campellone MD

Online Medical Reviewer: Marianne Fraser MSN RN

Online Medical Reviewer: Raymond Kent Turley BSN MSN RN

Date Last Reviewed: 03/01/2024

© 2000-2025 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
Related Articles
Read article
Read article
Orthopedics
Self-Care for Low Back Pain

Rest your back for a day or two to begin healing. Use a firm mattress or the floor. Have your lower back firmly supported with a small pillow or towel. Keep your knees slightly bent, with another pillow under them. Every few hours, get up and walk as much as you can.

Read article
Read article
Orthopedics
General Neck and Back Pain

Learn how to care for yourself at home when you have neck or back pain.

Read article
Read article
Orthopedics
Back Pain (Acute or Chronic)

Back pain is 1 of the most common problems. The good news is that most people feel better in 1 to 2 weeks, and most of the rest in 1 to 2 months. Most people can remain active.

Read article
Read article
Orthopedics
Back and Neck Pain

Back and neck pain can interfere with your ability to function. Overuse, overweight, and other problems can cause back and neck pain.