So you have a breakout from your earbuds, and you head to the pharmacy. You see two common ingredients: benzoyl peroxide and azelaic acid. A leading dermatologist breaks down the difference to help you choose the right one for your specific skin issue.
Benzoyl peroxide is a powerful antibacterial agent. A skin expert explains that it works by releasing oxygen into the pore, which kills the P. acnes bacteria that contribute to inflammatory acne. It is very effective for red, angry pimples and pustules. However, it can be quite drying and irritating for some people, especially on the sensitive skin around the ears.
Azelaic acid is a gentler, multi-tasking ingredient. The dermatologist notes that azelaic acid is also antibacterial, but it is primarily known for its anti-inflammatory and keratolytic properties. This means it calms redness and helps exfoliate the skin to unclog pores. It is also effective at fading the dark marks (post-inflammatory hyperpigmentation) that pimples can leave behind.
So, which one should you choose? The expert recommends starting with azelaic acid if your issue is a mix of clogged pores, general redness, and irritation, or if you have sensitive skin. If you are dealing with distinct, inflamed, pus-filled pimples, benzoyl peroxide might be a more potent choice, but use it sparingly as a spot treatment to minimize dryness.
Regardless of your choice, consistency and proper use are key. The dermatologist advises applying a thin layer to the clean, dry affected area once a day. And remember, these are treatments for mild acne. If the problem is persistent or severe, a dermatologist can offer prescription-strength versions of these ingredients or other, more powerful therapies.