Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs SacroiliitisUpdated: 2017-06-13OverviewSacroiliitis is inflammation of 1 or both of the joints that connect the lower spine and pelvis (sacroiliac joint).SymptomsPain is often in the buttocks and lower back. It may occur in the legs, groin, and feet. It can increase with activity.TreatmentsTreatments focus on relieving pain. They can include medications, muscle relaxants, and physical therapy. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use