Arachnoiditis is a debilitating condition characterized by pain and it is caused by an inflammation of the lining that surrounds and protects the spinal cord nerves—there are three layers that surround the brain and spinal cord and the arachnoid is one of these nerves. This inflammation causes irritation of nerves which causes the nerves to bind to each other in turn causing numbness, tingling, stinging and burning in legs and even muscle spasms and in severe cases can cause paralysis.
Can be caused due to infection from viruses (viral or fungal meningitis) or bacteria, chemicals, direct injury to the spine or spinal procedure complications.
There is no cure but the focus is on pain relief and like it done with other chronic pain conditions. The outlook is complicated because it differs between patients, there is no predictable pattern or the type of symptoms. It is important to try anti inflammatory medications, exercise, corticosteroids, massage, hot/cold therapy, spinal cord stimulator device.