Gnathophyma involves swelling of the chin.
[1]: 693 It is a type of lesion associated with rosacea, a common chronic inflammatory skin disorder of the sebaceous (oily and fatty) glands characterized by redness, swelling, and acne-like pustules.
Other lesions associated with rosacea, which affects about 10 percent of fair-skinned people normally between the ages of 30 and 50, include: Treatment for mild to moderate cases includes an oral antibiotic or topical gel or cream.
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