How Does a Cortisone Injection Work?

The medicine is delivered to a specific area rather than taken throughout the body. It can calm swelling and irritation around a joint, bursa, or tendon sheath. Pain relief may make gentle movement and physiotherapy easier, but the injection does not repair a torn structure or remove every cause of pain. A clinician chooses the location and dose after examining you.

Tell the clinician about diabetes, blood-thinning medicine, allergies, infection, and previous injections. Follow the advised activity plan after the procedure; the area may be sore briefly, so avoid demanding use until you are told it is appropriate. Use the injection window to work on mobility or strengthening when recommended. For examples of conditions where this treatment may be considered, see [Frozen Shoulder](/conditions/frozen-shoulder/) or [Golfer's Elbow](/conditions/golfers-elbow/).

Contact the treating service promptly if redness, warmth, swelling, drainage, fever, or worsening pain develops at the injection site. Seek urgent help for breathing difficulty, facial swelling, fainting, or sudden severe weakness. New symptoms after an injection deserve assessment rather than another dose without review.

Ask which structure will be injected, what improvement is realistic, how long to modify activity, and whether physiotherapy should begin or change afterward. Also ask how your medical conditions or medicines affect the plan.