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Punctate porokeratosis is a skin condition that appears in adulthood as many, tiny, ridgelike bumps on the palms of the hands and soles of the feet. These bumps may slowly spread over the skin and usually do not cause symptoms, though they sometimes cause itching or discomfort while walking. Individuals with this condition often develop other types of porokeratosis as well. The cause of punctate porokeratosis is unknown, though genetic factors, a weakened immune system (immunodeficiency), or previous injury to the skin (for example, a burn) have been suggested as possible risk factors. Treatment depends on the size, location, and aggressiveness of porokeratosis in each affected individual; it may include observation only, medication, or surgery.[4659]
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