Lower left back pain above hip when sitting?

Muscle or disc deg: Nternal disc disruption pain withsitting need to shift position , if tender and tight muscle.

Many possibilities: Many things could do this: degeneration in the low back disk and joints, muscle injury or strain, pelvic arthritis (sacroiliac joint disease). If simple things like exercise, stretching, otc medication, heat or cold fail, and the pain continues, talk with your personal doctor.