The pain in your stomach when you have your period may be caused by dysmenorrhea or PMS and can be treated with medication. There are many pain medications, such as the common ones like ibuprofen and diclofenac sodium, which inhibit the synthesis of prostaglandins, thus preventing excessive contractions of the uterus and providing some relief. If the dysmenorrhea is more severe, for women who require contraception, they can also be treated with oral contraceptives or with the intrauterine device Manuel, which can relieve dysmenorrhea by inhibiting ovulation and reducing the prostaglandin content in menstrual blood. If the pain is mild, there is no need to be overly nervous, pay attention to rest, you can apply hot compresses, and you can also take massage to regulate. It is important to relax and avoid mood swings and excitement that can aggravate menstrual pain.