Acute cutaneous eruptions usually fall into 3 main categories:- blistering, pruritic and/or bleeding. Blistering eruptions generally suggest an acute inflammatory process which may be triggered by viral/bacterial infections, bites, burns, severe contact dermatitis, medications or immunological diseases. Patients may have significant areas of their skin involved in the blistering process leading to large areas of painful erosions, this can represent acute skin failure and rapid deterioration of the patient. Acutely pruritic eruptions may also present urgently and can be associated cutaneous swelling – they may represent allergic reactions to mediations or exogenous chemicals manifesting as urticaria and angioedema of may be acute eczema or insect bites reactions. Localised cutaneous bleeding may indicate a benign condition such as a pyogenic granuloma however widespread non-blanching purpura may indicate a more serious disease such as vasculitis or purpura fulminans. Severe cutaneous adverse reactions are among the most common dermatological emergencies and it is worthwhile for all medical practitioners to be aware of the diagnosis and management of such patients presenting with Stevens-Johnson-Syndrome and Toxic epidermal necrolysis.