Skin diseases and allergic reactions 

It is a rare but serious problem most often caused by reaction to medicines. It causes the skin to blister and peel off.

It is a cutaneous drug reaction that recurs at exactly the same site with repeated exposure to the agent.

Drug reactions can be classified in many ways. One useful approach is to separate predictable reactions occurring in normal patients from unpredictable reactions occurring in susceptible patients.

Acne is a multifactorial disease primarily of teenagers with follicular plugging and inflammation. It presents with polymorphic lesions including, papules, and lesions involving the face, chest, shoulders and back.

It is an extremely pruritic chronic inflammatory skin condition.