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Dermatofibromas
are small red-to-brown bumps (nodules) that result from an accumulation
of collagen, which is a protein made by the cells (fibroblasts)
that populate the soft tissue under the skin.
Dermatofibromas are common and usually appear as single firm bumps, often on the legs, particularly in women. Some people develop many dermatofibromas. Causes include trauma, insect bites, and cuts caused by shaving. Dermatofibromas are harmless and usually do not cause any symptoms, except for occasional itching. Usually, dermatofibromas are not treated unless they become bothersome or enlarge. A doctor can remove them with a scalpel.
Last full review/revision February 2003
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