How long does cortisone injection take to work for frozen shoulder?

The injection reduces inflammation around the shoulder joint; it does not immediately loosen a stiff joint capsule. Some people notice a short-lived increase in soreness after the injection before comfort improves. Benefit may build over the following days and can vary with the stage of frozen shoulder, baseline stiffness, and the accuracy of the injection.

Pain relief may make daily movements and physiotherapy easier, but an injection does not reverse every cause of restricted motion. A gradual return of reach, dressing, and sleeping comfort is a more useful measure than expecting an instant change.

Follow the clinician’s advice about relative rest immediately after the procedure, then resume gentle shoulder movements as advised. Avoid forcing a painful stretch or lifting heavily while the area is tender. If exercises have been prescribed, use the period of reduced pain to practise them consistently; this helps maintain gains as the medicine wears off.

Keep track of pain, sleep, and specific movements such as reaching overhead. If there is no meaningful change after the timeframe your clinician gave you, arrange a review. Read more about [Frozen Shoulder](/conditions/frozen-shoulder/) and [Cortisone Injection](/treatments/non-surgical-orthopedics/cortisone-injection/).

Contact the treating service promptly for increasing redness, warmth, swelling, drainage, fever, or feeling unwell after the injection. Seek urgent help for severe worsening pain, new weakness, or loss of sensation in the arm. These signs need assessment rather than waiting for the injection to take effect.

Ask when you can restart prescribed exercises, which movements should be limited, and what improvement would be expected at your follow-up. You can also ask whether your shoulder’s current stage changes the treatment plan and what the next option is if pain settles but stiffness remains.