Hip pain when lifting it or moving it while laying down. Hurts to lift with leg extended and when bent at knee. Cause? 17 yrs old f 208 lbs htn & pcos

Hard to say. There are several possibilities and an exam could probably determine the cause. Probably the three most common causes in a 17 year old would be a soft tissue condition around the hip such as a tendinitis, or an inflammatory condition of the hip itself such as a synovitis, or that it is a non musculoskeletal condition involving the abdomen or pelvis. Consider being seen.