Kenalog (triamcinolone acetonide) is a corticosteroid injection often used as a "quick fix" for severe or stubborn acne. It is primarily used by physicians to treat deep, painful cystic acne that doesn't respond well to topical creams. ​

How It Works

​When injected directly into an acne lesion, Kenalog acts as a powerful anti-inflammatory. It suppresses the immune response in that specific spot, which:
 

• ​Shrinks the cyst: Reduces the size of the bump, often within 24–48 hours. ​

• Relieves pain: Quickly eases the throbbing pressure associated with deep nodules.

• ​Prevents scarring: By stopping the inflammation early, it reduces the likelihood of the skin tissue being destroyed and leaving a permanent scar.

The Procedure ​Administration: A physician uses a very fine needle to inject a diluted version of the steroid into the center of the cyst. ​
Sensation: Most patients describe it as a quick "pinch" or "sting."

​Timing: The entire process takes less than a minute. Results typically start appearing in 4–8 hours, with significant flattening by the next 1-2 days.

Potential Risks and Side Effects
 

• Skin Atrophy - The most common risk: If the steroid is too concentrated or injected too superficially, it can cause a "divot" or indentation in the skin. This usually resolves in a few months but can occasionally be permanent.

• Hypopigmentation: A temporary lightening of the skin at the injection site, more common in people with darker skin tones.

• Telangiectasia: The appearance of tiny broken blood vessels on the surface of the treated area.

Cost: The first area is $100 and subsequent areas are $50 per injection.