Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP) is a rare neurological disorder that is characterized by progressive weakness and impaired sensory function in the legs and arms. It is caused by an autoimmune disorder in which the body's immune system mistakenly attacks the myelin sheath, the protective covering that surrounds nerve fibers. Symptoms of CIDP include muscle weakness, numbness, tingling, and pain in the arms and legs. In some cases, the disorder can also affect the autonomic nervous system, leading to problems with blood pressure, heart rate, and digestion. Treatment for CIDP typically involves immunosuppressive medications, physical therapy, and in some cases, intravenous immunoglobulin therapy.