Erythema Multiforme: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Erythema Multiforme?
A dermatologist, a doctor who treats skin conditions, often leads care for erythema multiforme. An ophthalmologist, an eye doctor, may help if the eyes are involved. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is erythema multiforme?
Erythema multiforme is a reaction of the immune system, the body's defense system. It affects the skin and sometimes the mucous membranes. Mucous membranes are the moist linings of the mouth, eyes, and genitals.
The rash often forms target-shaped spots, which doctors call target lesions. Erythema multiforme is the mildest of three related skin disorders. Stevens-Johnson syndrome is more severe. Toxic epidermal necrolysis is the most severe.
Symptoms
The main sign is a rash. It often shows up on the hands, feet, arms, and legs. It is usually the same on both sides of the body. Signs can include:
- Red spots or raised ridges, sometimes with blisters.
- Spots that form rings and look like a target. A crust may form over the center.
- Sores in the mouth.
- Fever, a general ill feeling, and joint pain.
- Eye pain, dry or bloodshot eyes, or vision changes.
Skin spots are usually not painful. Sores in the mouth and other moist areas often hurt. Painful mouth sores can make eating hard, and some people lose weight.
Doctors describe a milder minor form and a more severe major form. In the major form, sores affect at least two moist areas, such as the mouth and the eyes.
Causes and who gets it
Infections and medicines are the most common triggers. Herpes simplex virus, the virus that causes cold sores, is the most common infection behind it. Mycoplasma pneumoniae, a germ that causes lung infection, is another common cause, especially in children.
Medicines that can trigger it include some antibiotics, anti-seizure medicines, and anti-inflammatory pain medicines called NSAIDs. Other triggers include some vaccines, autoimmune diseases, and contact with poison ivy. Autoimmune diseases are conditions where the body attacks itself.
It can start at any age. It is most common in children and young adults. It affects slightly more males than females.
How doctors diagnose it
Doctors usually diagnose erythema multiforme from your history and a skin exam. The size, shape, color, and spread of the target spots are key clues. Stevens-Johnson syndrome looks different because it does not have the typical target spots.
Doctors also ask about recent infections and medicines to look for a trigger. A chest x-ray can show lung changes from a Mycoplasma infection. A skin biopsy, which means a small piece of skin is removed and checked under a microscope, can help when the diagnosis is unclear.
Treatment
Most cases get better on their own. The spots usually fade within 2 to 3 weeks without scarring. The major form takes 4 to 6 weeks. Treatment aims to ease symptoms until the rash clears.
The first step is to remove the cause. For example, a doctor may stop a medicine that could have triggered it. Do not stop a medicine on your own. Follow your doctor's instructions. Other care depends on the cause and the symptoms:
- Moist compresses for blisters and raw spots, and over-the-counter antihistamines for any itching.
- Antiseptic mouthwashes and numbing medicine for mouth pain, and petroleum jelly for the lips.
- Antibiotics if a Mycoplasma infection is the cause.
- Antiviral medicine, which fights viruses, if herpes is suspected.
Steroid medicines and intravenous immune globulin, an infusion of antibodies, have been tried. There is limited evidence that they work. If herpes keeps causing erythema multiforme, long-term antiviral medicine can prevent new outbreaks. Severe cases may need hospital care for severe pain, dehydration, or trouble eating. An ophthalmologist plays a key role in managing any eye problems.
When to see a doctor
See a doctor if you have a rash with target-shaped spots. Get care promptly if you also have sores in your mouth, eyes, or genitals, trouble eating or drinking, or eye pain or vision changes. These can be signs of a severe case, which can be life-threatening and may need hospital care.
Call 911 or go to the emergency room if you have trouble breathing, you faint, or you have a sudden change in mental state, such as confusion.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. A primary care doctor is often the first to see the rash. This kind of doctor can look for a trigger, review your medicines, and send you to a skin doctor or eye doctor when needed. They can also follow your recovery.
Common questions
Is erythema multiforme the same as Stevens-Johnson syndrome?
No, they are separate conditions. Erythema multiforme is the mildest of the related skin disorders, and Stevens-Johnson syndrome is more severe.
How long does erythema multiforme last?
Most cases clear within 2 to 3 weeks without scarring. The major form takes 4 to 6 weeks. Sores in the mouth and other moist areas take longer to heal.
Can erythema multiforme come back?
Yes, it can come back, mainly when herpes is the trigger. Long-term antiviral medicine can help prevent new outbreaks, so ask your doctor about it.
What triggers erythema multiforme?
Infections and medicines are the most common triggers. Herpes simplex virus is the most common infection behind it, and some antibiotics and anti-seizure medicines can trigger it.
Sources
- NCBI Bookshelf - Erythema Multiforme (StatPearls)
- National Organization for Rare Disorders - Erythema Multiforme
- MedlinePlus - Erythema multiforme on the hands
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
