How effective is steroid injection into the skin for cystic acne?

A dermatologist injects a small amount of corticosteroid directly into a deep, inflamed acne lesion. By reducing inflammation in that confined area, the injection may make a painful lump flatter and more comfortable over the following days. It is generally a spot treatment, not a replacement for a complete acne plan.

The skin at the injection site can become lighter, thinner, or slightly indented, particularly if treatment is repeated or the medicine spreads into nearby tissue. A deep lesion may still leave a mark, so early assessment and avoiding squeezing remain useful.

Have the lesion examined before injection, since infections and other bumps can look similar. Tell your clinician about previous reactions, current acne medicines, pregnancy or pregnancy plans, and any tendency toward light or dark marks after inflammation. Keep using the agreed skin-care routine for untreated acne.

Cleanse gently, avoid picking, and use non-comedogenic products. Ask when to return if the lump does not settle, becomes softer and drains, or new painful lesions keep appearing; persistent cystic acne often needs treatment that works across the affected skin.

Seek prompt review if redness spreads, pain intensifies, the area feels hot, or drainage and fever develop. Contact the clinic about a persistent depression or colour change after treatment. Get urgent help for facial swelling, breathing difficulty, or widespread hives after an injection, and avoid attempting a home injection.

Ask whether the lesion is suitable for injection, how soon improvement should be judged, and what local skin effects to watch for. Discuss a routine for preventing new cysts, options if lesions recur, and how to reduce the chance of long-lasting marks.