Hi Thank you for asking HCM. I have gone through your query. Your problem can be due to sacroiliac joint arthritis or due to muscle strain. An examination with orthopedician will give clue for that. Sacro iliac joint arthritis will get relief by locally injecting corticosteroids. For muscle strain I treat my patients with NSAIDs like aceclofenac and muscle relaxants like thiocolchicoside.If it is present for long term then physiotherapy also should be done to get relief. Hope this may help you. Let me know if you have any further queries.