premenstrual acne

例句：

1. 1. She was diagnosed with premenstrual acne and had to take medication for it.
   她被诊断出有经前痤疮，并不得不服用药物。
2. 2.Many women experience premenstrual acne during their menstrual cycle.
   许多女性在月经期间经历经前痤疮。
3. 3.The cause of premenstrual acne is not fully understood, but it is believed to be related to hormone fluctuations during the menstrual cycle.
   经前痤疮的原因尚未完全明了，但据信与月经周期中激素波动有关。