during menses body have spurts of androgen. these androgen causes stimulation of pilosebaceous duct and leads to acne during this period. these types of acne usually appear in chin area may be because of more concentrated pilosebaceous unit localized to this place. do maintain hormonal imbalance with the help of antiandrogen to reduce acne during these days. for further information consult a dermatologist online --> <link>
what causes acne when we were on our period?