Hips Hurt All Of A Sudden My Hip Hurts And I Have No Idea Why Does Anyone Have Ideas?

My hip hurts and i have no idea why does anyone have ideas? - hips hurt all of a sudden

The other day I was hurt to walk to school and suddenly my left hip ass / started. was not so bad, but the more I walk it hurts more. im a 15 and I do not think that I like arthritis or something like that be. began only 2 or 3 days. only hurts when in walkin or hip movement. no idea what could be the problem? i havent hurt or anything so its a mystery to me?