T-cell mediated rash with systemic features
>90% of cases attributable to a medication (usually an antibiotic)
Mortality rate of ~5%
Acute generalized exanthematous pustulosis
Positive Nikolsky’s sign
Herpetic whitlow
Febrile
Erythema infectiosum
Staphylococcal scalded skin syndrome 
Dermatitis herpetiformis
Toxic epidermal necrolysis/SJS 