Erythema multiforme is an inflammation of the skin characterized by the presence of red spots and blisters that spread throughout the body, being more frequent to appear on the hands, arms, feet and legs. The size of the lesions is varied, reaching several centimeters, and usually disappear after about 4 weeks.
The diagnosis of erythema multiforme is established by the dermatologist based on the evaluation of the lesions. In addition, complementary tests may be indicated to check if the cause of the erythema is infectious, and the dosage of Reactive Protein C, for example, may be requested.
Symptoms of erythema multiforme
The main symptom of erythema multiforme is the appearance of lesions or red blisters on the skin that are symmetrically distributed throughout the body, appearing more frequently in the arms, legs, hands or feet. Other symptoms indicative of erythema multiforme are:
- Rounded skin wounds; Itching; Fever; Malaise; Fatigue; Bleeding from injuries; Tiredness; Pain in the joints; Difficulties in eating.
It is also common for sores to appear in the mouth, especially when erythema multiforme occurs due to infection by the herpes virus.
The diagnosis of erythema multiforme is made by the dermatologist by observing the symptoms described by the person and assessing skin lesions. It may also be necessary to carry out additional laboratory tests to check if the cause of the erythema is infectious, being necessary in these cases the use of antivirals or antibiotics, for example. Find out how the dermatological exam is done.
Main causes
Erythema multiforme is a sign of an immune system reaction and can occur due to allergies to drugs or food, bacterial or viral infections, the Herpes virus being the virus most commonly associated with this inflammation and leading to the appearance of sores in the mouth. Know the symptoms of herpes in the mouth and how to avoid it.
How the treatment is done
The treatment of erythema multiforme is done with the aim of eliminating the cause and relieving the symptoms. Thus, if the erythema is caused by a reaction to a medication or a certain food, it is recommended to suspend and replace that medication, according to medical advice, or not to consume the food that is causing the allergic reaction.
If the erythema is due to a bacterial infection, the use of antibiotics is recommended according to the bacteria responsible for the inflammation, and if it is caused by the herpes virus, for example, the use of antivirals, such as oral Acyclovir, which should be taken according to the medical recommendation.
To relieve the discomfort caused by wounds and blisters on the skin, you can use cold water compresses on the spot. Learn more about treatment for erythema multiforme.
