The sacroiliac (SI) joint, located at the junction of the spine and pelvis, does not move much, but it is an important transitional point between the upper and lower parts of your body. Pain in the SI joint usually occurs as a result of overuse or when the pelvic muscles have been weakened, such as during and after pregnancy.
Diagnosing the problem can be challenging because there are no imaging tests that isolate the SI joint. Usually, however, pain in the upper buttocks and lower back is indicative of a problem with the SI joint.
“There are two basic ways to treat SI pain,” says Joel West Ray, MD, FACS, neurosurgeon at Saint Francis Medical Center. “You can work with physical therapists to try to stabilize the joint. Or, you can work with your doctor, who can give you medications and sometimes injections to lessen the pain; in rare cases, innovative surgery is used to stop the pain at the sacroiliac joint.”
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