Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs SynovitisUpdated: 2017-06-13OverviewSynovitis is a condition in which the smooth lining of a joint or tendon gets inflamed. There are different types, depending on the affected joint or tendon.SymptomsSymptoms may include pain, swelling, and instability of the joint.TreatmentsTreatments vary depending on the type. They may include medications, surgery, physical therapy, and radiation. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use