This procedure involves using a diluted form of a medication called triamcinolone acetonide (Kenalog) and injecting this substance directly into the pimples. It is used for short-term relief of inflammation and greatly reduces the size of the acne lesions. In addition to alleviate the symptoms, it helps preventing the possibility of permanent scarring.
Usually, small pimples will reduce the swelling, redness, and pain in around 24-48 hours after the injection. Small lesions can be cleared in a couple of days. In large bumps or cysts it may take a bit longer. To speed it up, the doctor may also prescribe oral antibiotics to help further.