Toothpaste on pimples: does it work?

My early acne routine included the bathroom shelf's greatest hits.

If a product could sting, dry, scrub, or smell medicinal, I assumed it must be doing something useful. Toothpaste fitted the theory beautifully. It made a spot feel tight, and tight felt suspiciously similar to progress.

It was not progress. It was mostly an irritated pimple with minty ambitions.

I understand why this trick survives. A pimple arrives before a date or photograph, the toothpaste is three steps away, and the internet promises an overnight rescue. But a product designed for enamel, plaque, foam, and fresh breath is a poor match for facial skin.

The short answer

Do not put toothpaste on pimples.

It may dry the surface temporarily, but it does not properly treat the clogged follicle and inflammation that cause acne. Detergents, flavourings, and other ingredients can irritate skin, causing burning, redness, peeling, or a rash around the mouth.

If toothpaste is already on the spot, rinse it off gently. Use a plain moisturiser if the area feels sore, and choose an acne treatment made for skin.

Why toothpaste appears to work

Toothpaste can make a pimple feel drier and look flatter for a short time. That visible change gives the trick its reputation.

Drying the top is not the same as treating the follicle below. The spot may still be inflamed, while the surrounding skin now has an irritation problem as well.

Older toothpaste formulas sometimes contained triclosan, an antimicrobial ingredient that helped build the myth. Formula changes vary by country and brand, and antibacterial activity on teeth does not turn toothpaste into a tested acne medicine.

Acne treatment needs the right ingredient, concentration, vehicle, contact time, and safety testing for skin. Toothpaste offers none of that predictability.

What in toothpaste can irritate skin?

Toothpaste formulas are complicated. They may contain:

• detergents that create foam
• abrasives that help clean teeth
• fluoride compounds
• mint, cinnamon, or other flavourings
• humectants that keep the paste from drying in the tube
• preservatives, colour, and sweeteners

Sodium lauryl sulfate is a well-studied irritant used in patch-testing research. A large 2014 analysis^[1] found that people who reacted to SLS also showed more weak, questionable, and irritant reactions during patch testing. That does not mean every SLS toothpaste burns every face. It shows why an ingredient chosen to foam in the mouth is not a clever leave-on spot treatment.

Toothpaste can also cause reactions around the lips and mouth. A published case^[2] described perioral dermatitis associated with a highly fluoridated toothpaste. One case does not prove fluoride toothpaste commonly causes perioral dermatitis, and it is not a reason to stop dental care. It is a reminder that toothpaste can affect nearby skin.

Keep brushing your teeth. Keep the paste on the toothbrush.

What to do if toothpaste is burning

If the area stings, feels hot, or turns red:

1. Rinse with lukewarm water. Do not scrub.
2. Pat the skin dry.
3. Apply a bland, fragrance-free moisturiser if it feels comfortable.
4. Pause acids, retinoids, benzoyl peroxide, scrubs, and fragranced products on that patch until it settles.
5. Use sunscreen during the day if the skin tolerates it.

Seek medical help if you develop marked swelling, blistering, spreading rash, eye involvement, or breathing symptoms. Persistent bumps around the mouth may be perioral dermatitis, which needs a different plan from acne.

Better options for one pimple

The best choice depends on the type of spot.

A clogged surface bump

Salicylic acid can help loosen material inside oily follicles. Use a leave-on product as directed and start gently if your skin is sensitive.

A red inflamed pimple

Benzoyl peroxide is an evidence-backed acne treatment. It can irritate and bleach fabric, so concentration and careful use matter.

A pimple with fluid at the surface

A plain hydrocolloid patch can absorb some fluid and stop fingers reaching the spot. It will not treat a deep nodule.

A deep painful lump

Leave it alone. Cold wrapped briefly in a clean cloth may feel soothing. A dermatologist can assess repeated or severe deep acne and may offer treatments that work below the surface.

The 2024 acne guidelines^[3] strongly recommend benzoyl peroxide and topical retinoids, among other treatments, with conditional recommendations for salicylic acid and azelaic acid. Toothpaste is absent for a sensible reason.

The overnight-fix problem

Most spot hacks sell speed because waiting feels impossible.

A visible pimple is emotional. We inspect it from six angles, touch it to see whether it still hurts, then apply too much of something aggressive. The next morning, the skin is flatter but redder, and we call that a mixed result.

A calmer response usually looks boring:

• cleanse gently
• apply one appropriate treatment
• moisturise if needed
• keep hands away
• go to bed

One pimple does not require a new routine. Repeated acne needs a consistent routine across the breakout-prone area, not a series of kitchen and bathroom experiments.

The practical takeaway

Toothpaste can dry a pimple's surface because toothpaste is good at being toothpaste. That does not make it good skincare.

The chance of irritation is real, the acne benefit is unproven, and better options already exist. Use salicylic acid, benzoyl peroxide, or a hydrocolloid patch where appropriate. Ask a dermatologist about deep, painful, scarring, or persistent acne.

I spent enough time treating stinging as proof that something worked. You do not need to repeat that part of my education.