Menstrual cramps cause pain in your lower abdomen during the first few days of your period. Cramps are caused when the muscles of your uterus contract, or squeeze. The pain sometimes spreads to the lower back or thighs. Some girls also get dizzy, vomit, or have nausea or diarrhea with cramps.
Many teenagers have cramps with their period.
Use ibuprofen. (Advil, Motrin, Nuprin) or naproxen (Aleve). These drugs help take away the pain and reduce the number of cramps you have.
You shouldn't need to miss any school, work, or social activities because of cramps. If ibuprofen or naproxen do not help, ask your doctor about getting a stronger medicine.