Im 14, female.. the past few nights, i have been waking up anywhere between 1 and 5 in the morning because of leg cramps in my calf muscles in both legs, and it happens in the day too.. most of the time they last a good few minutes and are extremely painful. I m not entirely sure why, and I really don t know what to do about them, because they are extremely painful, and after they have happened, i get a feeling that it will come back, which hurts to walk..