Why do some women have more pain during their periods?

Period Pain Reason: Period cramps, i.e., pain during menstruation, is a common problem for most women. This pain occurs when the muscles of the uterus contract to allow blood flow and the lining of the uterus to come out. In this process, the body releases a hormone called prostaglandin, which increases the contraction of the uterus.
If the level of prostaglandin is high, then the cramps can also be more intense. Some women have mild pain, which can be easily managed, while some have so much pain that their daily activities are also affected.
Sometimes, period pain can also be a sign of an underlying health condition. In endometriosis, the lining of the uterus starts spreading out, causing unbearable pain. Fibroids, i.e., non-cancerous lumps formed in the uterus, can also increase the pain. PCOS can cause irregular periods as well as severe pain and bloating.