List of what causes bruise and conditions for which bruise symptoms are related. If you want to know, "Why do I have bruise?" consider that bruise can be caused by a number of illnesses. This is a list of diseases that bruise is a symptom of, including diseases associated with bruise. What diseases cause bruise? List ranges from Chronic myelogenous leukemia to Anorexia nervosa and more. This list of diseases with bruise as a symptom is in alphabetical order with images when available, though it can also be sorted. If you could say "I am experiencing bruise," please consult a physician.