Skin diseases and allergic reactions 

A skin condition characterized by itchy papular eruptions on the extensor area of the upper and lower limbs which is associated with HIV infection

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.

Infantile haemangioma is the most common benign vascular tumor of infancy, arising from abnormal proliferation of endothelial cells. It typically appears during the first few weeks of life, undergoes a period of rapid growth during infancy, and then gradually regresses over several years.

Dermatitis herpetiformis is a chronic autoimmune blistering skin disease characterized by intensely itchy papules, vesicles, and excoriations, usually occurring symmetrically on the extensor surfaces of the body. It is the cutaneous manifestation of gluten-sensitive enteropathy (celiac disease) and results from the deposition of immunoglobulin A (IgA) within the skin.

It is an extremely pruritic chronic inflammatory skin condition.