Hi as your complain you may have sacroillitis and lumber spasm but for better diagnosis you have to take an x-ray and consult with a good orthopedic Doctor. Then take Physiotherapy treatment.
Next Steps
Do hot fermentation, take ift and ultrasound therapy your near by Physiotherapy center, do back extention and stretching exercises. Feel free to contact me if you have any questions or queries.
Health Tips
Don't forward band, stop ground sitting and line, stop Indian toilet, avoid cross legs sitting and climbing stairs. Get well soon....😊