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This is the fastest fix in acne, and it is also the most oversold. A cyst that would take three weeks to settle usually flattens in two to four days. That is real, and in the week before a wedding or a photo it matters.
But it treats one bump. It does nothing for the acne underneath, and nothing for the next cyst. If you are coming in every few weeks for shots, the shots are not the problem being solved.
The trade-off worth knowing: too strong a dose leaves a small dent in the skin. That dent usually fills back in over several months, but not always quickly. A lower concentration is safer, and a slightly slower result is a fair price for it.
— Dr. Schwarz, Board Certified Dermatologist
Key Facts
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| Also called | Intralesional steroid injection, intralesional triamcinolone, cortisone shot |
| Downtime | None. You can go back to work straight away |
| Sessions | One injection per cyst, as needed |
| Typical cost | About $50 to $250 per visit in the US; varies by city and by how many spots are treated |
| Results timeline | Softening in 24 to 48 hours, mostly flat by day 3 to 5 |
| Pain | A brief sting, a few seconds |
| Skin tone safety | Safe for all skin tones. On brown and Black skin, too strong a dose can leave a lighter patch that takes months to fade |
What It Is
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A very small amount of diluted steroid, usually triamcinolone acetonide, injected directly into one swollen acne cyst or nodule. It is not the same as steroid pills or a steroid cream — the dose stays in that one bump. A dermatologist uses it when a single deep spot is painful, large, or will not settle on its own.
How It Works
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A cyst is swollen because your immune system is attacking clogged, bacteria-filled oil deep in the skin. Steroid switches that immune reaction off locally. Once the inflammation stops, the pressure and redness drop and the bump shrinks. The steroid also helps break down the thickened tissue around it. It does not kill bacteria, unclog the pore, or reduce oil production, which is why a spot can return in the same place.
What It Treats
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Each grade is the same one shown on that condition’s page.
Pros
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- Speed Nothing else works this fast. A cyst that would take two to four weeks to resolve is usually flat within a few days.
- Pain relief Deep cysts ache. The pressure eases within a day, often before the bump looks better.
- Scar prevention A cyst that stays inflamed for weeks is more likely to leave a mark or a dent. Cutting the inflammation short lowers that risk.
Cons
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- It treats one spot It does not prevent the next cyst. It is a rescue, not a treatment plan.
- Cost and access Each visit needs an appointment with a provider who can inject, which is hard to arrange on short notice.
- Dents and light patches Too high a dose can thin the skin and leave a small depression or a pale halo. This usually fills in over 2 to 6 months but can last longer.
How to Prepare
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Nothing special is required. Do not pick at, squeeze, or heat the spot beforehand — that makes it more swollen and harder to inject. Wash your face and skip makeup on the area if you can. Tell your provider if you are pregnant, if you have had a dent from a previous injection, or if the spot is warm, spreading, or draining pus, which can mean infection rather than acne.
What Happens
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Does it hurt?
A sharp sting for a few seconds, and more if the cyst is already tender. Most people rate it lower than they expect. There is no numbing that helps much, because the needle stick is the whole procedure.
Recovery
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Aftercare
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How long to hold off on each of these.
| Makeup | Same day, once the needle site closes (about 1 hour) |
| Exercise | Same day |
| Sun | No restriction, but daily sunscreen helps the leftover mark fade faster |
| Actives | Restart retinoids, benzoyl peroxide, and acids the next day |
Results
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Softening usually starts within 24 to 48 hours and the spot is mostly flat by day 3 to 5. A large or stubborn nodule occasionally needs a second small injection at 3 to 4 weeks. The result for that spot lasts, but a flat discoloured mark can remain for weeks to months and the injection does not speed that up. People are most often disappointed by two things: the mark left behind, and a new cyst appearing elsewhere a week later. Neither means the injection failed.
Risks and Side Effects
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Side effects are uncommon at the low doses used for acne, and most are local and temporary.
Common — expected, and they settle
- A small dent A shallow depression at the site from local fat and collagen thinning. It is dose-related and usually fills back in over 2 to 6 months.
- A lighter patch A pale ring or spot, more visible and slower to fade on brown and Black skin. It usually recovers but can take many months.
- Bruise or pinpoint bleeding Fades in a few days.
Tell your doctor — worth a call, not an emergency
- Worth a call A dent or light patch still there after 6 months, or getting larger.
- Visible small vessels Fine red lines can appear after repeated injections in the same area.
- Frequent injections If you need several a month, ask about a daily prevention plan instead. Repeated or high doses can rarely affect the whole body.
Get care now
- Get care now Increasing pain, spreading redness, warmth, fever, or pus after the injection. That suggests infection, which needs same-day treatment, not more steroid.
How Many Sessions
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One injection per cyst. A large or stubborn nodule may need a second at 3 to 4 weeks. There is no set course. Needing more than a few injections in a month is a sign the underlying acne needs daily treatment — a topical, an oral antibiotic, hormonal treatment, or isotretinoin — rather than more shots.
Combining Treatments
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What you can stack: Anything. It fits alongside topical retinoids, benzoyl peroxide, oral antibiotics, spironolactone, hormonal birth control, and isotretinoin. It is often used during the early weeks of an isotretinoin course, when flares are common.
Spacing from other procedures: No spacing needed. Injections can be done at the same visit as extractions. Wait until a cyst is flat before doing a peel or laser over that area.
Cost
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Roughly $50 to $250 per office visit in the US, often billed as an office visit plus a procedure charge rather than per spot. Cost varies widely by city, practice type, and how many lesions are injected.
Insurance often covers it, because acne cysts are treated as a medical problem rather than a cosmetic one. Coverage still depends on your plan and deductible.
Who Should Avoid It
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Do not have it
- An infected spot A boil or abscess with pus, spreading redness, or fever needs drainage or antibiotics, not steroid.
- A spot that is not acne Boils, epidermoid cysts, and hidradenitis lesions are handled differently. A provider should look before injecting.
- Skin already thinned If the area is dented from a previous injection, injecting there again raises the risk further.
Have it with care
- Pregnancy Small single injections are generally considered acceptable, but many providers prefer to wait or use the lowest dose. Discuss it first.
- Brown and Black skin The main risk is a lasting light patch. Ask for a lower concentration, often 2.5 mg/mL or less, rather than standard strength.
- Diabetes Steroid can raise blood sugar briefly. The acne dose is tiny, but tell your provider.
- Many spots at once Injecting several lesions in one sitting raises the total steroid dose. Ask what the total is if a large number is planned.
Finding a Provider
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Board-certified dermatologists, and the physician assistants and nurse practitioners working with them, do this routinely. Ask what concentration they use — for facial acne, 2.5 to 5 mg/mL is common, and 10 mg/mL or higher is usually more than a facial cyst needs. A provider who injects every spot at every visit, or who will not discuss a daily acne plan, is not treating the acne.
At-Home Versions
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FAQ
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How fast does a cortisone shot work on a cyst?
Softening usually begins within 24 to 48 hours, and most spots are flat by day 3 to 5. The red or brown mark left behind can take weeks longer, and the injection does not speed that up.
Will it leave a dent?
It can. A shallow depression happens when the dose is too strong for the spot. It is usually temporary and fills back in over 2 to 6 months. A lower concentration lowers the risk.
Can I get one before an event?
Yes, and this is the most common reason people ask. Aim for 3 to 5 days ahead so the swelling has time to drop. A same-day injection rarely looks better by that evening.
Does it stop acne from coming back?
No. It treats only the spot it is injected into. Preventing the next cyst needs a daily treatment plan.
Is it safe on dark skin?
Yes, but the specific risk is a lighter patch at the site, which is more noticeable and slower to fade on brown and Black skin. A lower concentration is the main way to reduce that.