Erythema Nodosum

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What is the erythema nodosum?
Erythema nodosum is a skin condition that causes red or purplish swelling. Swelling is most often found in the calf of the shin region, but can also occur in other parts of the body.


Erythema nodosum is the most common form of panniculitis, which is inflammation of the layer of fat under the skin. This is often caused by an immune system response to infection or the reaction of the drug you are taking.

Erythema nodosum is most common in people aged 20-40 years. Erythema nodosum can occur at any age regardless of sex. But indeed, women are reported to be 6 times more susceptible to experiencing this condition than men.

Signs & Symptoms
What are the signs and symptoms of erythema nodosum?
The main symptom of the erythema nodosum is a red lump in the calf area. Sometimes, lumps can also appear on the thighs, arms, chest and face. The size of the lump can vary, ranging from 4-11 cm. The amount can also vary between people, it can be only two or up to 50 across the body.

Lumps of erythema nodosum are painful and may feel hot. At first the lump is red and then turns purple, like a bruise when you want to recover. This lump also deflates when healed. Lumps can last around 2 weeks. New lumps can continue to appear for up to 6 weeks.

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