What is steven johnson syndrome?

Severe allergic rash: Stevens -johnson is amongst the most severe allergic reactions one can have. It is almost always a reaction to a drug or vaccine. It usually occurs 1 week after a first exposure or 1-2 days after a second. It causes severe blistering of the skin and is a life threatening emergency that always requires inpatient hospital care-often in a burn unit.

SJS: Stevens-johnson syndrome is a rare, serious disorder in which your skin and mucous membranes react severely to a medication or infection. Often, stevens-johnson syndrome begins with flu-like symptoms, followed by a painful red or purplish rash that spreads and blisters, eventually causing the top layer of your skin to die and shed.

Drug reaction: One of the most severe and life-threatening forms of drug reactions. Patients peel off their skin and may need to be treated in the burn unit.