A pinched nerve occurs when too much pressure is applied to a nerve by surrounding tissues, such as bones, cartilage, muscles or tendons. This pressure disrupts the nerve’s function, causing pain, tingling, numbness or weakness.
A pinched nerve can occur at a number of sites in your body. A herniated disk in your lower spine, for example, may put pressure on a nerve root, causing pain that radiates down the back of your leg. Likewise, a pinched nerve in your wrist can lead to pain and numbness in your hand and fingers (carpal tunnel syndrome).
Pinched nerve signs and symptoms include:
When to see a doctor
See your doctor if the signs and symptoms of a pinched nerve last for several days and don’t respond to self-care measures, such as rest and over-the-counter pain relievers.
A pinched nerve occurs when too much pressure (compression) is applied to a nerve by surrounding tissues.
In some cases, this tissue might be bone or cartilage, such as in the case of a herniated spinal disk that compresses a nerve root. In other cases, muscle or tendons may cause the condition.
In the case of carpal tunnel syndrome, a variety of tissues may be responsible for compression of the carpal tunnel’s median nerve, including swollen tendon sheaths within the tunnel, the enlarged bone that narrows the tunnel, or a thickened and degenerated ligament.
A number of conditions may cause the tissue to compress a nerve or nerves, including:
If a nerve is pinched for only a short time, there’s usually no permanent damage. Once the pressure is relieved, nerve function returns to normal. However, if the pressure continues, chronic pain and permanent nerve damage can occur.
The following factors may increase your risk of experiencing a pinched nerve:
Other risk factors include:
The following measures may help you prevent a pinched nerve: