Thigh hurts when i move it/walkhad sciatica thought got better.get waves of pain at bottom spine/hip.cant think of anything that physically caused it.

Radiculopathy: Very commonly a disc protrusion can cause radiating posters lateral thigh pain. If associated with numbness tingling or weakness, or any other neurological symptoms, really should have primary care get a baseline lumbar mri, so that it may be followed as you progress through your life, so that decisions might be made more intelligentlu.

Sciatica: Pain in the distribution as you suggested describes the pattern of the nerve that travels in the leg called the sciatic nerve. The sciatic nerve is not the cause of the pain source, it is the result of an irritated nerve typically in the lumbar spine (low back) which are caused by herniated disks, spinal stenosis or degenerative disc disease requiring further evaluation by a spine specialist.