A rash of the axillae that develops and involutes spontaneously

A 35-year-old woman is referred for evaluation and management of a rash involving both axillae. She reports recurring episodes of the same rash beginning in her early 20s. Lesions develop and involute spontaneously. Areas affected included the axillae, neck, and groin. Historically, outbreaks are more common and worse during the summer, and after vigorous exercise. Both her father and brother ...