Acne mechanica.
D000152:Acne Vulgaris / Q000209:etiology*; D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009910:Oral Hygiene / Q000592:standards; D009967:Orthodontic Appliances / Q000009:adverse effects; D012146:Rest; D013314:Stress, Mechanical; D013546:Sweating