PSA: Think Twice Before Using Lemon Juice as an Acne Spot Treatment

When life hands you lemons, make... a spot treatment? That's what the Internet—and/or your grandmother and her litany of old-school beauty remedies—might have you believe. But is this type of "juicing" for your skin a good way to beat blemishes, and/or even a good idea in the first place? In theory, it makes sense, thanks to a variety of different components in lemon juice (namely citric acid) that are beneficial for your skin in their own right. But, according to dermatologists, that does not—we repeat, does not—mean you should be squeezing lemons onto your pimples. Ahead, experts explain exactly why that's a less-than-stellar idea, and what you should keep in mind if you do decide to try this risky DIY treatment.

Keep reading to learn more about lemon juice for acne.

What is Lemon Juice?

Yes, it's the juice from a lemon, but it's the various components in it that make it theoretically beneficial for acne-prone skin. And those benefits are, to a certain extent, legit; in fact, lemon juice often pops up in skincare products. But it's not quite that simple. "While you may see lemon juice listed as an ingredient in your favorite cleanser or serum, that doesn’t mean applying it directly to the skin will provide the same benefits," warns Nussbaum. "Products you buy off the shelves are carefully formulated by chemists using ingredient concentrations that provide optimal and safe benefits." So where does all of that info touting fresh-squeezed lemon juice as the ultimate blemish-buster come from? Let's dive deeper into those aforementioned components.

Benefits of Lemon Juice for Acne

Citric acid is the star of the show; lemon juice contains an especially high concentration of it, according to Nussbaum. As a choice exfoliating ingredient, it can help keep pores clear. Additionally, some research has found that citric acid possesses antimicrobial properties and may be effective against p.acnes, an acne-causing bacteria. "This is in part due to the high level of acidity, which creates a less hospitable environment for bacterial growth. The acidity also has an astringent effect on the skin, helping to reduce oil production and minimize pore size," says Nussbaum.

Lemon juice is also a good source of ascorbic acid—which you likely know as vitamin C—a powerful antioxidant, notes Arch. (It's an ingredient known for helping to combat hyperpigmentation caused by acne scarring as well). "I love using vitamin C topically, but there are much more efficient ways of delivering vitamin C to the skin that don't involve direct application of lemon juice," she adds.

You may have heard that lemon juice has anti-inflammatory benefits... and anything anti-inflammatory has to be good for acneic skin, right? Not so fast. While it does have some anti-inflammatory properties, the acidic nature of lemon juice and high likelihood of irritation (more on that in a moment) far outweighs the soothing aspects. Not to mention that it's the compound found in the peel, limonene, that delivers the bulk of those anti-inflammatory effects, adds Arch, rather than something in the juice itself.

Side Effects of Lemon Juice for Acne

To put it bluntly, irritation, irritation, and more irritation is the name of the game with lemon juice. As mentioned, it goes back to its acidic nature. Our skin has a pH of around 4.5-5.5, while lemon juice has a pH of around 3. "This discrepancy is part of the reason it's so irritating, and can end up causing stinging, peeling, and redness," she adds. Along those same lines, the combination of citrus juice and UV rays (i.e. if you were to apply lemon juice to your skin and then go out in the sun with no sunscreen) can lead to a condition called phytophotodermatitis, a hyperpigmented rash. And, that particular issue aside, lemon juice can make your skin more sun-sensitive in general, adds Henry.

How to Use Lemon Juice for Acne

The short answer, at least according to the dermatologists we spoke with, is to just not use it in the first place. There are plenty of safer acne-fighting ingredients and products on the market that would serve you far better, says Nussbaum. (She also adds that if you're dealing with chronic acne flare-ups or deep cystic acne, you really should be seeking advice from a board-certified dermatologist and not going the DIY route in the first place). Arch agrees: "While the acidic properties of lemons seem like they'd be a natural fit for acne, applying lemon juice directly to the skin can cause more harm than good. There are more effective and readily tolerable treatments available, so I really don't see a place for it in anyone's skincare routine," she says.

That being said, if you're dead set on trying lemon juice as a zit-zapper, there are a few important things to keep in mind. First, you should only even attempt this if your acne is mild and your skin is not sensitive, says Henry. And when you do, test it out on an area other than your face to see how your skin reacts; diluting it with water is also a good move, she adds. If all seems to be okay, spot treat blemishes only by dabbing on the juice with a cotton swab and washing off after a few minutes. Be sure to load up on sunscreen, and, above all, "stop using lemon juice immediately if you notice any signs of irritation or skin discoloration," Henry warns. But again, many other spot treatment options are far safer and more effective than lemon juice.