How long does a cortisone injection take to work for piriformis syndrome?

The injection is intended to calm irritation around the piriformis muscle and nearby tissues. If local anaesthetic is included, numbness or quick relief may occur first and then wear off. Cortisone works on inflammation more gradually. Persistent buttock pain may also involve the sciatic nerve, the lower back, the hip, or pelvic movement, so an injection may not address every source of symptoms.

Temporary soreness at the injection site is possible. A response is best judged by changes in sitting tolerance, walking, sleep, and radiating leg pain over the days that follow.

Keep activity light at first and avoid provoking stretches, sprinting, deep squats, or long periods in one position until your clinician says they are suitable. Gentle walking may be useful if it does not increase symptoms. Follow the prescribed rehabilitation plan, which may address hip strength, pelvic control, and movement habits rather than relying on the injection alone.

Record what improves and what triggers pain. If symptoms remain unchanged after the clinician’s suggested review window, ask whether the diagnosis, injection target, or physiotherapy plan needs reassessment.

Contact the treating service if increasing redness, swelling, drainage, or worsening pain develops at the injection site. Seek urgent assessment for fever, severe new leg weakness, loss of bladder or bowel control, numbness around the groin, or rapidly worsening pain. Those symptoms need prompt evaluation and should not be explained away as piriformis syndrome.

Ask what structure was injected, when you can return to driving or exercise, which symptoms should improve first, and how long to wait before review. Ask how the injection will be combined with exercises and whether persistent leg symptoms require assessment of the spine or hip.