Why are some periods more painful than others? I am 17

Prostaglandins. Prostaglandins are pro-inflammatory hormones and contribute to the pain of menstrual cycles. Our american fast food diet is high in pro inflammatory producing substances. Omitting fast foods and eating more fresh foods will help a lot. There can also be hormonal imbalance contributing...I have had tremendous success with acupuncture and chinese medicine improving issues like yours.