Skin diseases and allergic reactions 

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

It is an acute viral infection caused by Herpes simplex virus hominis (types HSV1, HSV2 acquired by close contact with an infected individual

Pemphigus foliaceus is a chronic autoimmune blistering disease characterized by the formation of superficial, fragile blisters caused by autoantibody-mediated loss of adhesion between epidermal cells. Unlike pemphigus vulgaris, pemphigus foliaceus primarily affects the skin and rarely involves the mucous membranes because the autoantibodies mainly target desmoglein 1, a protein found in the superficial layers of the epidermis.

eborrheic dermatitis is a chronic, recurrent inflammatory skin disorder that primarily affects areas of the body rich in sebaceous (oil) glands. It is strongly associated with overgrowth of Malassezia species (a normal skin yeast), together with an abnormal inflammatory response of the skin.