Erythema Multiforme

Causes of erythema multiforme

Source: NHS

The cause oferythema multiforme is often unclear, but some cases are the result of a reactionto an infection or medication.

The condition can't be passed from person to person.

Infections

Most cases are caused by a viral infection often the herpes simplex (cold sore) virus. This virus usuallylies inactive in the body, but it can become reactivated from time to time.

Some people willget a cold sore a few days before the rash starts.

Erythema multiforme can also be triggered bymycoplasma bacteria, a type of bacteria that sometimes cause chest infections .

Medication

Medication can occasionally cause the more severeform oferythema multiforme. Possible medication triggersinclude:

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