Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) is a neurological disorder that targets the bodys nerves. It is a rare type of autoimmune disorder where the body attacks the myelin sheaths, which are the fatty coverings on the fibers that insulate and protect the nerves. CIDP is closely related to Guillain-Barre syndrome (GBS), but while GBS is generally considered more of an acute, or short-term, disease, CIDP is considered a chronic, or long-term, disease. Symptoms of CIDP include progressive weakness, reduced senses in the arms and legs, tingling or no feeling in fingers and toes, loss of deep tendon (muscle stretch) reflexes, fatigue or feeling tired, and unusual feelings in the body. There is no test to diagnose CIDP, but doctors may recommend tests to get a better idea of whats going on with the nerves and to rule out other possible causes. Treatment for CIDP includes the use of steroid medicine and other treatments that focus on the immune system, along with physical therapy. The course of CIDP can vary greatly between different people, as can the response to treatment.