Apple cider vinegar is a popular home remedy for acne, used as a toner, spot treatment, or face wash. Its acetic acid content gives it antibacterial properties and a strongly acidic pH of 2 to 3, which is why it must always be diluted before touching your skin. While no large clinical trials have proven it clears acne, many people use it as a low-cost addition to their skincare routine. Here’s how to do it safely if you want to try it.
Why People Use It for Acne
Apple cider vinegar contains acetic acid, malic acid, and other organic acids that can kill certain bacteria on contact and help dissolve dead skin cells. Healthy skin has a slightly acidic pH around 4.5 to 5.5, and some proponents argue that ACV helps restore that acidity after washing with alkaline cleansers. The idea is that rebalancing your skin’s pH creates a less hospitable environment for acne-causing bacteria.
That said, undiluted vinegar has a pH of 2 to 3, which is far more acidic than your skin needs. At that concentration, it doesn’t restore balance; it causes damage. Every method below relies on diluting ACV with water first.
How to Use It as a Toner
A toner is the most common way people apply ACV for acne. The basic recipe is 2 tablespoons of apple cider vinegar mixed into one glass (about 8 ounces) of water. You can also add a teaspoon of rosewater or witch hazel and a few drops of lavender or chamomile essential oil if you like, though these are optional.
To apply it:
- Wash your face with your regular cleanser first.
- Dip a cotton pad into the diluted mixture and gently swipe it across your face and neck.
- Let it air dry, then follow with your usual moisturizer.
You can use this once or twice a day. If you have dry or sensitive skin, cut the amount to 1 tablespoon or less per 8 ounces of water to prevent flaking and tightness.
How to Use It as a Spot Treatment
For individual pimples rather than your whole face, a spot treatment is a more targeted approach. Dip a cotton swab into undiluted or lightly diluted ACV and dab it directly onto the blemish. Because you’re applying a smaller, more concentrated amount to a tiny area, the risk of widespread irritation is lower, but you should still watch for redness. If the skin around the spot becomes inflamed or stings for more than a few seconds, rinse it off and switch to a more diluted solution next time.
How to Use It as a Face Wash
A third option is mixing ACV into warm water and using it as a rinse. Combine 1 tablespoon of apple cider vinegar with a quarter cup of warm water. Splash or gently massage it onto your face, then rinse with plain water and pat dry. This method gives your skin the briefest contact with the acid, which makes it the gentlest starting point if you’ve never used ACV before.
What to Do After Applying
ACV can make your skin more sensitive to the sun, so applying a broad-spectrum sunscreen during the day is important whenever you’re using it regularly. Follow every application with a moisturizer, especially if your skin tends to be dry. The acid strips some natural oils, and skipping moisturizer can trigger your skin to produce even more oil in response, potentially making breakouts worse.
Patch Test First
Before putting any ACV mixture on your face, test it on a small area of skin that’s less visible, like the inside of your forearm or behind your ear. Apply the diluted solution, wait 24 hours, and check for redness, itching, or irritation. If nothing appears, it’s generally safe to move to your face. If you see any reaction, don’t use it.
Risks of Getting It Wrong
The biggest danger with ACV is using it undiluted or leaving it on too long. Vinegar contains 4 to 8 percent acetic acid, which can erode skin and cause chemical burns. One case published in The Journal of Clinical and Aesthetic Dermatology described a woman who applied apple cider vinegar to her nose daily for three days, covering the area with bandages. By the second day she had significant redness and irritation, and she was left with erosions on her skin. The doctors warned that home remedies like this can result in scarring and lasting discoloration.
Signs you should stop using ACV immediately include persistent redness, peeling, a burning sensation that doesn’t fade within a minute, or any raw or broken skin. These are signs of a chemical burn, not a normal reaction.
What Dermatologists Say
Most dermatologists are lukewarm on ACV for acne. As one dermatologist at Nebraska Medicine put it, “It’s not a magic topical and not one I would necessarily recommend.” The general advice from skin specialists is that if you already have a diagnosed skin condition, whether that’s cystic acne, eczema, rosacea, or psoriasis, ACV can cause more harm than good. These conditions typically need prescription-strength treatment, and the acid in vinegar can aggravate already compromised skin.
For mild, occasional breakouts, diluted ACV is unlikely to cause problems as long as you follow the dilution ratios above and stop at the first sign of irritation. But it’s worth keeping expectations realistic. ACV doesn’t contain the active ingredients found in proven acne treatments like benzoyl peroxide or salicylic acid, and there’s no clinical evidence it works better than those options. It’s best thought of as a supplementary step in your routine, not a replacement for treatments with stronger research behind them.