Small squishy sacs around your joints called bursae get inflamed. You might feel stiff, and it might hurt to move the joint in a normal way. Though it’s linked to certain injuries and diseases, the cause of any specific case is often unclear. It might last a short time, or it could be a long-term problem. Your doctor can help you treat it with drugs, physical therapy, and lifestyle changes.
These fluid-filled sacs cushion your joints. They lessen the rubbing between your bones, tendons, muscles, and skin. When injured or overused, they can collect extra fluid and get inflamed, and over time their walls may thicken.
