Recently I broke out with a rash, that followed the presence of skin eruption, and papule/blister like condition on my skin, especially my torso.  Doctors initially thought this was due to allergies, and allergy testing did show signs of inclreased histamine, and increased Ig E.  I was treated with three doses of cortisone injections.  Condition has not gotten better. What else could be causing this problem.
Hi, There can be multiple of possibilities of the recurrent rashes. You have not mentioned your age, sex and occupation in your history so that I would have helped you better. After reading your history I can tentatively make a diagnosis of allergic rash turning into blister. You search for any specific cause before its development. Take a course of antibiotics such as ciprofloxacin or CEA Chat Doctor.  Do not pinch, pop or squeeze the area. Give proper rest to the affected leg and keep it raised. For pain part you can take tablet paracetamol or diclofenac two times. If at all it is recurring then can meet specifically a dermatologist for best possible diagnosis. Take care.