Robert Wood Johnson University Hospital
 

Erythema Nodosum

Erythema Nodosum

What is erythema nodosum?

Erythema nodosum is characterized by tender, red bumps, usually found on the shins. Quite often, erythema nodosum is not a separate disease, but, rather, a sign of some other disease, or of a sensitivity to a drug.

Diseases that can cause erythema nodosum

Drugs that can cause erythema nodosum

What are the symptoms of erythema nodosum?

The following are the most common symptoms of erythema nodosum. However, each individual may experience symptoms differently. Symptoms may include:

Young adults are particularly susceptible to erythema nodosum. The symptoms of erythema nodosum may resemble other skin conditions. Always consult your physician for a diagnosis.

How is erythema nodosum diagnosed?

A biopsy (removal of tissue for examination under a microscope) of a bump can usually confirm the diagnosis. However, the exact cause cannot always be identified. Drug-induced erythema nodosum can usually be diagnosed by elimination of the drug causing the reaction.

Treatment for erythema nodosum

Specific treatment for erythema nodosum will be determined by your physician based on:

Treatment may include:

Although erythema nodosum is uncomfortable, it is usually not a serious condition. Symptoms are usually gone within six week; however, they may recur. 

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