My thigh hurts almost all the time. it's a sharp pain and dull and achy. coach said stretch, ice, and heat. what could it be? i play basketball.

You probably: had a contusion which is a blunt force trauma to a small vessel inside your thigh. Such trauma usually causes some bleeding which then stayed in your thigh and slowly gets absorbed by your body. This process may take weeks to months depending on the size of the bruise. Less likely you could have a deep venous clot in your thigh which would cause chronic pain and swelling. Go see a MD.