Burning, Pain In Left Buttocks, What Could Be The Cause?

Pulled muscles possibly

www.coccyx.org

Gluteus maximus syndrome

The gluteus maximus muscles are the powerful muscles in the buttocks
that raise you from sitting to standing, and also lower you into a
sitting position. The gluteus maximus is attached to the coccyx as well
as to other bones. A spasm or tightness of this muscle can pull on the
coccyx and cause pain when you move into a sitting position or raise
yourself. It doesn't cause pain while you are sitting. The spasm, and
the pain, is normally just on one side.
Diagnosis
The features that distinguish gluteus maximus pain are:

1. it hurts while raising or lowering yourself, even into a squatting position
2. the pain doesn't depend on whether you actually put pressure on the
   coccyx by sitting - it goes away while you are sitting, instead of
   getting worse

If you have gluteus maximus pain, a manual practitioner who examines
you will find muscle spasm, joint stiffness and tenderness at the
lumbo-sacral joint on the same side as the pain. If the practitioner
puts pressure on the point where the gluteus maximus is attached to the
side of coccyx, this will reproduce the patient's pain.
Treatment
Manual treatment of the back and buttock muscle should solve the
problem, usually in 3 to 5 treatments, with clear improvement felt
after the first treatment.