Having an epidural often results in arachnoiditis. The cause of arachnoiditis is a factor that determines the kind a person develops. Frequent causes are:
-an injury during spinal surgery, which is the reason for 60 percent of cases
-myelography, when the spinal column is injected with dye
-exposure to chemicals that damage the meninges
-injections into the spine, such as following an epidural
-lumbar puncture
-viral and bacterial infections of the spine
-physical trauma to the spine, such as from a car accident
-cancer in or around the spine
-A very small number of arachnoiditis cases are genetic.