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.
doctor icon

Find the right provider to meet your needs

From primary care to specialty services and more.

Find a Doctor
appointment clock icon

Call for an Appointment

Offering personalized care at more than 20 clinics across three cities and two states.

Call Now
Related Articles
Read article
Orthopedics
Having a Discogram

This test may help find which disk is causing your back or leg pain.

Read article
Orthopedics
Types of Lumbar Disk Surgery

You have a problem disk in your lower back. This disk problem may be corrected with a diskectomy. This is the surgical removal of a part of a disk. There are 3 types of diskectomy. Each has risks and benefits. Your surgeon will advise the type that's best for your back and your health.

Read article
Orthopedics
Transverse process fracture

You have fractured a transverse process. You have 2 transverse processes that extend off each vertebra, 1 on each side. This is where the muscles and ligaments of the back attach to the spine.

Read article
Orthopedics
Cervical Epidural Injection

For certain types of neck pain, your health care provider may suggest a cervical epidural injection. During this procedure, medicine is injected deep into your neck near your spine.