Urticaria, toxic erythema, erythema multiforme, lichen planus, vasculitis and panniculitis are important dermatoses. Urticaria presents as itchy red patches and weals that change shape and last minutes to hours. Toxic erythema appears as an erythematous rash most prominent on the trunk caused by drugs, infections or systemic illnesses. Erythema multiforme features target-like lesions with a dusky purple center and red rim, often on the trunk and palms. Panniculitis is inflammation of subcutaneous fat, seen as erythema nodosum on the shins. Vasculitis