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What is erythema nodosum? — This is a condition that causes painful red, red-brown, or purple bumps on the legs (picture 1). The bumps can look like bruises. Some people get erythema nodosum after an infection called "strep throat." It can also happen with other conditions, or by itself.
What are the symptoms of erythema nodosum? — The main symptom is painful red, red-brown, or purple bumps on the legs. These are usually on the shins. But some people also have bumps on the thighs, arms, or upper body.
Some people have other symptoms before or after the bumps. These can include:
●Pain in the joints
●Fever
●Feeling sick, like with the flu
Will I need tests? — Yes. Your doctor or nurse will do an exam and learn about your symptoms. Many different conditions can cause erythema nodosum or symptoms like it. Your doctor or nurse can order tests to check for these conditions. Tests can include:
●Blood tests
●Chest X-ray
●Test for strep throat – Your doctor or nurse can run a swab (Q-tip) along the back of your throat and test the swab for bacteria.
●Skin test or blood test to check for tuberculosis – Tuberculosis is an infection that can cause erythema nodosum.
●Biopsy – The doctor takes a sample of tissue from 1 of the bumps. Another doctor looks at the tissue under a microscope. It can show if the bumps are erythema nodosum or something else. Most people do not need this test, but you might have it if your symptoms are unusual.
How is erythema nodosum treated? — Erythema nodosum usually gets better if the condition that is causing it goes away or is treated. As erythema nodosum gets better, the bumps start to look like bruises and then go away. They are usually gone in 2 to 8 weeks. Sometimes, the bumps leave dark spots on the skin that can take months to go away. But they do not leave permanent scars.
While you have the bumps, there are some things you can do to help reduce the pain. You can:
●Raise your legs up while sitting
●Rest
●Wear special socks called "compression stockings"
If you still have pain, you can try taking medicines called "NSAIDs." NSAIDs are a large group of medicines that includes ibuprofen (sample brand names: Advil, Motrin), naproxen (sample brand names: Aleve, Naprosyn), and indomethacin (sample brand names: Indocin, Indocid).
Talk with your doctor or nurse about which medicines you should take and how much.
Patient education: Strep throat in adults (The Basics)
Patient education: Strep throat in children (The Basics)
Patient education: Crohn disease in adults (The Basics)
Patient education: Ulcerative colitis in adults (The Basics)
Patient education: Sarcoidosis (The Basics)
Patient education: Nonsteroidal antiinflammatory drugs (NSAIDs) (The Basics)
Patient education: Sore throat in adults (Beyond the Basics)
Patient education: Sore throat in children (Beyond the Basics)
Patient education: Crohn disease (Beyond the Basics)
Patient education: Ulcerative colitis (Beyond the Basics)
Patient education: Sarcoidosis (Beyond the Basics)
Patient education: Nonsteroidal antiinflammatory drugs (NSAIDs) (Beyond the Basics)
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