I have a swollen, itchy area inside my right bicep. It is red and very warm to the touch. It started yesterday as a mild itch and progressed today.  It is now about 5 inches across.  Recently (over the last two months)I have experienced ramdom swellings in my feet, hands mouth/lips.  These episodes rarely last more than two days and then I return to normal.  I cant figure out what triggers it.  My Dr. has me keeping a diary because hes stumped too.
Hi, Dear , thanks for the query to Chat Doctor. I studied your query in-depth. My diagnosis-of your case is-"UV-urticarial vasculitis/ H-hypocomplentamic-UV". These red-itchy- lumps are ?autoimmune /?-allergic-chronic-urticaria-on the arm or else where in body. These UV/HUB lumps resolve in 2 days time. Treatment-a-Tb Cetirizine, b-Anti-worm-treatment-c-Anti-eosinophilic Chat Doctor. Hope This would resolve your query. Well come again for any more query.