Symptoms are the experiences of the patient.
Examples of symptoms include double vision, tingly sensations, or difficulty controlling the bladder. Examples of signs include weakness, abnormal reflexes, loss of coordination, and a disturbance of eye movements. Signs must be evident to the neurologist. The diagnosis of clinically definite MS requires documentation of two distinct episodes of symptoms and two or more signs evident on the neurological examination. Episodes of symptoms must last at least 24 hours and be separated by one or more months.