Dont worry it may be due to saccro iliatis.
Please get an x-ray done of lumber spine first.
Do hot water formantation at back.
Apply Rhumasyl oil for gental massage on pain areas for now.
After x-ray i will suggest better treatment.
Thank you
Next Steps
Avoid jerky movements and forward bending
Health Tips
Keep rest for 10 days, ultrasonic therapy at physiotherapy clinic