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