Acne mechanica frequently develops during the hot summer months. Athletes apparently move through their times of peak performance without as much as an ouch. But frequently after the intensity of athletic pursuit the damage becomes more noticeable. Along with sprang ankles and stress fractures--mechanical acne slowly comes into view.

Typically, small acne lesions occur in reddened patches of skin anywhere that athletic gear rubs during physical exertion. Acne mechanica results from the combination of friction, perspiration and decreased air circulation. Spandex and Lycra are particularly good as far as ease of movement is concerned but are the usual culprits in the causation of acne mechanica. Also notable offenders are elastic straps and tight fitting head gear.