Erythema multiforme is a skin reaction that can be triggered by an infection or medication. It's usually mild and goes away in a few weeks.

But there's also a rare, severe formthat can affect the mouth, genitals and eyes and can be life-threatening. This is known as erythema multiforme major.

Erythema multiforme mainly affects adults under 40, although it can occur at any age.

This page covers:


When to get medical advice

Causes and triggers



Content supplied by the NHS Website

Medically Reviewed by a doctor on 28 Sep 2016