Chronic inflammatory demyelinating polyneuropathy (CIDP) is a rare autoimmune disorder in which there is swelling of nerve roots and destruction of the covering (myelin sheath) over the nerves. This causes weakness, paralysis, and/or impairment in motor function, especially of the arms and legs. Sensory loss may also be present, causing numbness, tingling, and burning sensations. The motor and sensory impairments are usually found on both sides of the body. The severity of CIDP can vary from mild to severe. CIDP can affect any age group, and the onset may begin anytime throughout life.