How quickly does cortisone injection relieve joint swelling?

Cortisone reduces inflammation around the treated joint. As inflammation eases, fullness, stiffness, and pain with movement may gradually improve rather than changing all at once. A local anaesthetic may provide earlier comfort if it was included, but it does not represent the full anti-inflammatory effect.

Swelling may persist when fluid has another cause, when the joint has been irritated again, or when an injury needs separate treatment. The appearance of the joint is useful, but function matters too: note whether bending, walking, gripping, or reaching is becoming easier.

Follow the clinic’s instructions about rest and activity. Avoid heavy loading while the injection site is sore, then increase movement in small steps. Do not use reduced swelling as a reason to return immediately to demanding sport or repetitive work. Elevate the limb when advised, and use a cold pack only if your clinician says it is appropriate for you.

Check the joint for changes in size, warmth, colour, and movement without repeatedly pressing it. Keep a simple record of symptoms and medicines. For background, see [Joint Swelling](/symptoms/joint-swelling/) and [Cortisone Injection](/treatments/non-surgical-orthopedics/cortisone-injection/).

Arrange prompt medical assessment if swelling increases quickly, the joint becomes hot or very red, pain becomes severe, or you develop fever or feel generally ill. A worsening joint reaction needs examination and should not be dismissed as ordinary post-injection soreness.

Get urgent help for breathing difficulty, facial swelling, fainting, new weakness, or loss of sensation. If swelling has not started to improve within the timeframe provided by your clinician, contact the clinic for a review.

Ask when you should expect less swelling, which activities to pause, and whether you should measure or photograph the joint. Confirm what symptoms require a same-day call, how to manage medicines, and when follow-up is needed if the joint remains swollen.