Chronic inflammatory demyelinating polyneuropathy is an immune-mediated neuropathy that affects the peripheral motor and sensory nerves. The symptoms are of a slowly progressive numbness and tingling that usually starts in the feet, but later spreads to the legs and hands. The patients also complain of some weakness, again usually starting in the lower extremities, but soon involving the upper extremities. With further involvement of the sensory system, other modalities of sensations, such as balance, are affected and the patients complain of inability to walk or maintain balance in the dark. There is usually no bowel or bladder involvement. On rare occasions, cranial nerves are involved and their symptoms range from difficulty in swallowing to double vision and numbness involving the face. Cognitive skills are not affected by CIDP.