Hypochlorous Acid Spray: Everything You Need to Know About the Trending Antimicrobial and Antifungal Ingredient, According to Dermatologists

“This product is multi-purpose, covers many different skincare concerns, is easy to use, and is safe for all skin types,” says Garshick. “Because it helps repair skin, it can be used to treat all skin concerns, strengthens and soothes skin as it can reduce redness and inflammation, as well as skin sensitivity.” She explains that its antibacterial properties and spray formula make it great for treating breakouts and post-workout.

Given its versatile effects on acne, eczema and skin irritation, you may be wondering if it's possible to use the spray too often. The good news: not possible. “Because it's gentle on the skin and doesn't cause skin irritation, it's generally safe for routine use,” notes Garshick. She says it's best to apply it after cleansing and before serums or moisturizers, although it can be sprayed during the day as well.

While the cooler temperatures at the end of summer reduce the risk of sunburn, keep in mind potential skin irritation in the winter. Luckily, this spray can be used year-round. “It offers the convenience of a lightweight spray while soothing the skin and supporting the skin barrier, which can be especially helpful in the cooler winter months,” says Garshick. Based on all the expert recommendations and the enthusiastic recommendations of many users, this hypochlorous acid spray seems to be more of a beauty arsenal essential for those with sensitive skin than a social media trend. Consider stocking up before the transitional weather or for your end-of-summer trip—luckily, the spray also comes in a convenient travel size.

What is hypochlorous acid?

Board-certified dermatologist Dr. Mina Amin describes hypochlorous acid as “a naturally occurring molecule produced by our body’s white blood cells to prevent infection and speed up the healing process.”

What are the benefits of hypochlorous acid for the skin?

“As an antimicrobial solution, it helps reduce skin bacteria that play a role in common conditions like acne, eczema, and psoriasis,” explains board-certified dermatologist Dr. Azadeh Shirazi. “By removing the organisms that contribute to inflammation and disruption of the skin barrier, it helps heal the skin.” Amin points out that the ingredient is helpful in treating seborrheic dermatitis (dandruff) and also plays an important role in wound healing.

Is hypochlorous acid safe for skin?

Shirazi goes on to say that hypochlorous acid is safe and gentle – making it a great option for wounds and all skin types.[The ingredient] is especially helpful for acne, eczema and rosacea-prone skin to soothe inflammation and reduce redness while preventing acne,” agrees Amin. “It's the perfect post-workout and travel spray to prevent acne.”

Does hypochlorous acid work for eczema?

“Incorporating hypochlorous acid into your routine offers numerous benefits, primarily by reducing organisms such as harmful bacteria, viruses and fungi, reducing inflammation and promoting wound healing,” says Shirazi. “Since infection with bacteria often worsens inflammation and skin conditions such as eczema or acne, HOCl is a gentle yet effective treatment as it soothes inflammatory conditions with compromised skin barrier. It is safe to use around the eyes and mouth, making it useful as a cleanser around the eyes and mouth as it relieves discomfort.”

Is hypochlorous acid an antifungal?

Yes, hypochlorous acid has antifungal and antimicrobial properties – according to Shirazi and Amin.

How often should I use hypochlorous acid on my face?

How often you use hypochlorous acid on your face is up to you. It can range from three times a week to daily. “Hypochlorous acid spray is a great option to use after a workout before washing your face with an acne-fighting cleanser,” says Amin. “For those with acne-prone skin, I often recommend bringing a hypochlorous acid spray with them when traveling to help prevent breakouts.” However, she adds that hypochlorous acid can deactivate certain antioxidant serums (like vitamin C), so if you want to incorporate both into your routine, apply hypochlorous acid first.