Gnathophyma

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Gnathophyma involves swelling of the chin.Freedberg, et al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. {{ISBN|0-07-138076-0}}.{{rp|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:

• Rhinophyma (enlarged nose)
• Metophyma (enlarged cushion-like swelling of the forehead)
• Blepharophyma (swelling of the eyelids)
• Otophyma (a cauliflower-like swelling of the earlobes)

Treatment for mild to moderate cases includes an oral antibiotic or topical gel or cream.{{Cite book|title = Color Atlas and Synopsis of Clinical Dermatology, Seventh Edition.|last = Wolff|first = Klauss|publisher = McGraw Hill Professional|year = 2013|isbn = 9780071793032|location = New York|pages = 130–132}}