A cortisone shot for acne is a dilute triamcinolone acetonide injection into a single large, painful cyst or nodule to calm inflammation fast. It suits occasional stubborn nodulocystic lesions rather than widespread breakouts, and it works best alongside ongoing acne care.
Dermatologists use the shot to reduce pain, swelling, and elevation in that one lesion. It does not clear blackheads, whiteheads, or clusters across the face. Think of it as spot rescue plus daily treatment.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- Who is a good candidate?
- What happens during the visit?
- How fast does it work?
- What are the risks and downsides?
- What treatment should continue after the shot?
Who is a good candidate?
The best candidate has one or two large, tender, deep bumps before an event or that resist topical care. The injection targets inflammation inside that lesion. It is not designed for many small pimples spread over cheeks, forehead, or back.
A clinician will check lesion type, size, depth, and recent picking. Blood-filled or already draining lesions may need a different plan. People with many painful nodules usually need full-face treatment instead.
What happens during the visit?
The visit is brief. After cleaning the skin, the clinician injects a small amount of dilute steroid into the center of the cyst. The Journal of Clinical and Aesthetic Dermatology reports a common real-world method of 2.5 mg/mL triamcinolone, about 0.05 mL placed centrally, in its survey of injection technique.
The UK NICE guideline NG198 describes a lower-concentration option of 0.6 mg/mL in saline, dosed by cyst size and given by a consultant dermatologist-led team or accredited GP pathway. Practice varies by country, lesion, and clinician judgment. Ask what concentration and volume your clinic plans for your lesion.
- Confirm which lesion will be treated and why
- Share keloid, denting, pigment change, infection, or steroid history
- Ask about aftercare, makeup, picking, and follow-up treatment
How fast does it work?
Shrinkage often starts within 24-48 hours. Elect Dermatology reports the lesion lifespan shortens to about 4-7 days after injection. Pain and pressure usually ease first, then flatness improves.
Faster flattening can reduce the urge to pick or squeeze. Less trauma lowers scarring risk for that spot. The area may still leave redness or a dark mark while it heals.
What are the risks and downsides?
Known local harms include skin thinning, a dent from fat loss, and lighter skin. GoodRx notes these problems rise when dose is too high or placement is too shallow, and fading can take 6-12 months, in its overview of local side effects. Problems are uncommon in surveys, but dents can persist when they happen. The Journal of Clinical and Aesthetic Dermatology found most clinicians saw return visits for problems in under 1% of patients, yet atrophy lasted over six months in almost half of those cases.
Deeper cysts, facial fat pads, and darker skin tones deserve careful dosing. Tell your clinician about a new dent, pit, pale spot, redness, pain, or delayed healing. Early review allows treatment changes and photo tracking. Do not seek repeat shots in the same spot without medical advice.
What treatment should continue after the shot?
A shot is an adjunct, not a cure. Dermatology Times reporting the 2024 AAD acne guideline lists topical benzoyl peroxide, retinoids, antibiotics, oral doxycycline, and isotretinoin for severe disease, with intralesional corticosteroids only as added support, in its summary of the updated acne guidelines.
Keep using prescribed topical or systemic care unless told to stop. Track triggers such as heavy balms, picking, friction, and missed doses. Book follow-up if deep cysts return often, since that pattern signals a need for stronger ongoing care.