No slipped disc, no K stones, not sciatica, R low back pain moved to tingling hot heavy hip→groin pain. Hurts to sit, feels good to stand. Pls help!

Nerve impingement. can be caused by being sandwiched between two spinal bones, pressed by a bulging. It can cause muscle spasm and back pain. Prevention treatment is always recommended. This condition must be professionally managed. See interventional pain management specialist for definitive diagnosis and management. It is the same as a pinched nerve. .
Sacroiliac Joint. Oa of the sij is uncommon, but has been seen. Xray or MRI might reveal pathology in detail. Sij dysfunction or pain is common and generally treated with stretching/strengthening the joint. If this does not help, consider further evaluation by a specialist.