Arachnoiditis is a type of chronic pain caused by inflammation in the spinal canal.

Arachnoiditis is a chronic pain disorder caused by the inflammation of the arachnoid membrane and subarachnoid space that surround the nerves of the spinal cord. The inflammation can cause the meninges to adhere to the spinal cord and nerve roots.

Because the nerve roots are affected, symptoms such as numbness, tingling, and burning pain is often felt in the lower back or legs.

Severe cases of arachnoiditis can result in the loss of motor function, loss of bladder and bowel control and even paralysis. Arachnoiditis can arise from infection, direct spinal injury, and chronic compression of the spinal nerves or invasive spinal surgeries. The condition can be treated through certain types of physical therapy and pain management programs.