I'm a 19 year old female, with no known health concerns. I have had leg pains since I was a young child and was told they were growing pains. Well I'm 19 and believe I'm done growing. I get severe leg pains from the knees down, it hurts to walk, it hurts to even lay down. I also get the same pain in my arms, but usually never at the same time my legs hurt. Heat seems to relieve the pain but only just a little. I have noticed it only happens at night. Does anybody have an explanation?