What toothpaste can and cannot do for acne
Toothpaste is not a treatment for acne. Some toothpastes contain ingredients that may reduce inflammation or kill bacteria on skin, but they are formulated for teeth, not faces, and the concentrations are too low and the contact time too brief to treat acne meaningfully. The idea gained traction online because a few toothpaste ingredients—mainly triclosan and baking soda—do have antimicrobial properties, but using toothpaste on your face risks irritation, dryness, and damage to your skin barrier without delivering the dose or duration needed to clear breakouts.
If you have acne, over-the-counter products designed for skin—containing benzoyl peroxide, salicylic acid, or adapalene—have evidence behind them. If those do not work or your acne is moderate to severe, a dermatologist can prescribe treatments that actually address the root causes. Toothpaste is a shortcut that does not lead anywhere.
Key Takeaways
- Toothpaste contains some antimicrobial ingredients, but in concentrations too low and with too little contact time to treat acne on skin.
- Applying toothpaste to your face can irritate skin, dry it out, and damage your skin barrier, making acne worse.
- Benzoyl peroxide and salicylic acid, found in acne-specific products, have clinical evidence showing they work; toothpaste does not.
- If over-the-counter acne products do not work after 6 to 8 weeks, see a dermatologist rather than trying home remedies.
Why some toothpaste ingredients seem like they might work
Toothpaste often contains triclosan, an antimicrobial agent that kills bacteria. Since acne involves the bacterium Cutibacterium acnes (formerly called Propionibacterium acnes), the logic seems sound: if triclosan kills bacteria in your mouth, it should kill acne bacteria on your face. The problem is dose and delivery. Toothpaste sits on your teeth for a few minutes while you brush; even if you left it on your face, the amount of triclosan in toothpaste is calibrated for oral use, not skin treatment.
Baking soda, another common toothpaste ingredient, is mildly alkaline and can reduce surface bacteria. Some people report that baking soda paste feels soothing on inflamed skin. But baking soda is also drying and can disrupt your skin's natural pH balance. Using it repeatedly on acne-prone skin often makes inflammation worse, not better, because it strips away the skin's protective layer.
The confusion also stems from the fact that some acne treatments do contain antimicrobial ingredients—but they are formulated specifically for skin, at higher concentrations, and combined with other active ingredients that address inflammation and oil production. Toothpaste is not one of those formulations.
What happens when you put toothpaste on acne
Applying toothpaste to acne-prone skin typically causes irritation. Toothpaste is alkaline, while healthy skin is slightly acidic; this mismatch disrupts your skin barrier and can trigger redness, peeling, and increased sensitivity. If you have active breakouts, the irritation can make them more inflamed and slower to heal.
Toothpaste is also designed to be rinsed off quickly. If you leave it on your face for hours—a common approach people try—the drying effect intensifies. Your skin responds to this stress by producing more oil, which can paradoxically trigger more breakouts. Over time, repeated use can damage your skin barrier, making your skin more vulnerable to irritation from any product and less able to heal itself.
Some people report that toothpaste "dried out" their pimple, which can feel like progress. What actually happened is that the irritation caused temporary inflammation reduction and surface drying—not healing. The underlying cause of the acne remains, and the skin damage from the irritation often outweighs any short-term appearance change.
Ingredients in toothpaste versus acne-treatment products
Acne treatments that have clinical evidence behind them contain benzoyl peroxide (kills acne bacteria and reduces oil), salicylic acid (unclogs pores), or adapalene (a retinoid that normalizes skin cell turnover). These are available over the counter in concentrations proven to work: benzoyl peroxide at 2.5% to 10%, salicylic acid at 0.5% to 2%, and adapalene at 0.1%. Each has been tested in clinical trials showing they reduce acne lesions when used consistently.
Toothpaste contains triclosan at concentrations meant for oral bacteria, not skin bacteria, and baking soda at levels meant to gently polish teeth, not treat inflammation. No clinical trials have shown that toothpaste reduces acne. The ingredients are present, but not in the right form, dose, or context for skin treatment.
If you want to use an antimicrobial approach, a product containing benzoyl peroxide is the evidence-based choice. If you prefer a gentler option, salicylic acid or adapalene work through different mechanisms and may suit your skin better. A dermatologist can help you choose based on your skin type and acne severity.
How long to wait before trying something different
If you are using an over-the-counter acne product—benzoyl peroxide, salicylic acid, or adapalene—give it 6 to 8 weeks of consistent use before deciding it is not working. Acne takes time to respond because the skin cell cycle is about 4 weeks, and you need to see improvement across multiple cycles. Using a product for a few days or a week and then switching will never show you whether it works.
During those 6 to 8 weeks, use the product as directed—usually once or twice daily—and do not layer multiple acne treatments unless a dermatologist tells you to. If your skin becomes very irritated, reduce frequency to every other day, but keep using it. After 6 to 8 weeks, if you see no improvement or your acne worsened, stop and see a dermatologist. Do not move to toothpaste or other unproven home remedies; move to professional care.
When to see a dermatologist instead
If over-the-counter products do not work, or if your acne is moderate to severe (many breakouts, deep cysts, or acne on your chest and back), a dermatologist can prescribe treatments that actually work. These include topical antibiotics, oral antibiotics, hormonal treatments (for people who menstruate), or isotretinoin (for severe acne). These are not available over the counter and require professional assessment, but they have strong evidence behind them.
A dermatologist can also rule out other causes of breakouts—hormonal imbalance, rosacea, folliculitis, or a reaction to a product or medication—that would need different treatment. Trying toothpaste or other home remedies delays this diagnosis and can make your skin worse in the meantime.
Frequently Asked Questions
Does toothpaste dry out pimples?
Toothpaste can cause surface drying and temporary inflammation reduction, which may make a pimple look smaller for a few hours. This is not healing—it is irritation. The underlying acne remains, and repeated use damages your skin barrier, making future breakouts more likely and harder to treat.
Is it safe to use toothpaste on acne if I have sensitive skin?
No. Toothpaste is alkaline and drying, which is especially irritating for sensitive skin. If you have sensitive skin and acne, use products formulated for both—usually lower concentrations of benzoyl peroxide or salicylic acid, or adapalene, which tends to be gentler. A dermatologist can recommend options suited to your skin.
What if I have already tried benzoyl peroxide and salicylic acid and they did not work?
See a dermatologist. There are many other treatments available—topical retinoids, oral antibiotics, hormonal treatments, or isotretinoin—that work through different mechanisms. A dermatologist can assess your acne type and prescribe the right next step. Toothpaste will not help at this point.
Can I use toothpaste as a spot treatment overnight?
Leaving toothpaste on your skin overnight will dry and irritate it without treating the acne. You will likely wake up with more redness and irritation, not clearer skin. If you want an overnight spot treatment, benzoyl peroxide or adapalene products designed for skin are far more effective.