Menstrual rash

Menstrual rash is a rash associated with the menstrual cycle. For 1-3 days before menstrual cramps, erythema, pimples, wind masses, blisters, bullae, erosions, exudates, and conscious pruritus appear on the extremities, trunks, or parts of the body, and the rash will naturally fade and disappear with the end of menstruation . Generally believed to be related to the allergic reaction caused by the sudden increase in progesterone secreted by the ovaries before menstruation.