List of what causes cramp and conditions for which cramp symptoms are related. If you want to know, "Why do I have cramp?" consider that cramp can be caused by a number of illnesses. This is a list of diseases that cramp is a symptom of, including diseases associated with cramp. What diseases cause cramp? The list you're viewing is made up of different items like Hypothyroidism and Hyperthermia. This list of diseases with cramp as a symptom is in alphabetical order with images when available, though it can also be sorted. If you could say "I am experiencing cramp," please consult a physician.