My physical illnesses are type 1 diabetes (diagnosed), asthma (being treated, but not officially diagnosed since it's gotten worse since I last spoke to a doctor about it), and various allergies (goldenrod, pine, aloe vera, cats, some dogs, rats, horses, and chinchillas).
My mental illnesses are social anxiety disorder (diagnosed, it won't let me have a normal social life with anyone other than my fiancee - I can't even talk to people online without a freak-out first), slight dermatillomania (related to social anxiety, I pick at my forehead, cheeks, chin, back, shoulders, inner thighs, inside of my cheeks, lips, and any spot that has any breakouts/scabs), avoidant personality disorder (related to social anxiety, I literally hide from people, avoid responsibilities, and my own health if it means I can avoid a terrifying encounter), and I feel like I might have a mild case of OCD (undiagnosed, mainly because my social anxiety is much more severe, I have many unusual and strict rituals and habits (most common being that when I eat things that are in a bunch like M&Ms, Skittles, etc, I have to eat two at a time, one on each side of my mouth, both must be the same color or near each other on the color wheel - if this isn't achieved, it will bug me for hours), dermatillomania is usually seen as a version of a compulsive disorder, and I have to keep certain items in complete order, but my room is a mess, go figure).