The medical name for painful cramping during a girl's period is dysmenorrhea. Normal cramps happen in over 60% of girls. This cramping is caused by strong muscle squeezing of the uterus. This is ...

Symptoms can vary depending on the muscles involved. Hamstring muscles run along the back of the thigh, quadriceps work at the front of the thigh, and adductor muscles affect the inner thigh. Symptoms ...