I have severe pain that starts at the hip and shoots all the way down my leg. what could be the possible diagnosis?

Possibly a sciatica: A sciatica is caused by an irritation of a nerve in the back that then can cause pain that runs down the leg like you are describing. There are also potentially other causes as well. Usually a detailed history and exam can determine the cause. Thank you for your question.

Possible sciatica.: Pain radiating down a leg often comes from a pinched nerve in the lower spine, termed sciatica. X-rays or MRI may help in determining the cause.