Some people have pain in the low part of the abdomen when they menstruate. This is called dysmenorrhea, or cramps. Extreme and continuous cramps are not normal and should be checked upon with a medical practitionner. The hormones that are produced before and during a period can also make a woman feel moody, or just strange. This is called premenstrual syndrome (PMS), or premenstrual tension (PMT). A person can feel bloated or swollen and have long cramps. Some menstruators have extremely bad reactions to menstruation and may even feel suicidal. This is called premenstrual dysphoric disorder, or PMDD. Other physical effects include headaches, tender berasts, lower back pain, fatigue, acne, diarrrhea or constipation, trouble sleeping and more.