Routine Autopsy: Toothpaste on a Pimple, the Trick and the Burn

Dab a bit of Colgate on the pimple, sleep on it, wake up cured. Except a lot of people wake up with a red, peeling patch that looks worse than the pimple ever did. Here’s why the trick backfires and what actually works overnight.

Step 1: Why the trick “works” sometimes

Older, plain white toothpastes often contain baking soda, hydrogen peroxide, or triclosan, ingredients that can dry out skin and, in some cases, have mild antibacterial action. Dab it on a pimple and by morning the surface can look flatter or drier, which people read as “healed”. What actually happened is the top layer of skin got dehydrated and slightly irritated, which can make swelling look reduced temporarily.

Verdict: depends, and only barely. It can flatten the look of a pimple for a few hours, at a real cost to your skin.

Step 2: What toothpaste does to the skin around it

Toothpaste is formulated for tooth enamel and gums, not the thinner, more sensitive skin on your face. The same ingredients that clean your teeth, mint oils, sodium lauryl sulfate, fluoride, whitening agents, can cause redness, peeling, a burning sensation and sometimes a genuine chemical burn on facial skin, especially if left on for hours overnight. Gel and whitening toothpastes are worse than plain paste because they often carry stronger whitening or foaming agents.

Verdict: skip it. The irritation risk is real and common, not a rare bad reaction.

Step 3: What dermatologists actually recommend for a single pimple

A spot treatment with benzoyl peroxide (2.5 to 5 percent) or salicylic acid (0.5 to 2 percent), applied as a thin layer only on the pimple itself, does the job toothpaste is trying to do, minus the burn risk. These are made to sit on skin overnight. A pea sized amount is enough for one spot; more does not work faster and increases dryness.

1. Wash the area gently with a mild cleanser and pat dry, don’t scrub.
2. Apply a rice grain sized amount of benzoyl peroxide or salicylic acid spot gel directly on the pimple only.
3. Leave it on overnight, roughly 6 to 8 hours.
4. Wash off in the morning if the product label says to, follow the instructions on your specific product since strengths vary.
5. Repeat nightly for 3 to 5 nights, not longer, unless the label says otherwise.

Verdict: worth it. Same overnight habit, correct ingredient.

Step 4: Squeezing or popping first

Many people pop the pimple, then apply toothpaste to “seal” it. Popping pushes bacteria and inflammation deeper into the skin and is the single biggest cause of acne scarring. Do this before any spot treatment and you’ve made the outcome worse regardless of what you put on top afterward.

Verdict: skip it. Leave it alone, or see a dermatologist for extraction if it’s a deep, painful cyst.

Step 5: Ice before the spot treatment

Wrapping an ice cube in a clean cloth and holding it on an inflamed, painful pimple for a minute or two, a few times, can genuinely reduce swelling and redness before bed, since cold narrows blood vessels near the surface. It’s a reasonable, low risk add-on.

Verdict: worth it. Cheap, safe, mildly helpful.

Why toothpaste ended up as a home remedy in the first place

Before spot treatments were sitting on every pharmacy shelf, toothpaste was already in the house, already white, already had a reputation as a mild antiseptic from tooth care. That combination, cheap, already owned, vaguely medical sounding, is exactly the profile of a home trick that spreads by word of mouth long before anyone tests whether it’s actually the right tool for the job. Grandmothers passed it down the same way they passed down dabbing haldi on a cut, useful intent, wrong ingredient for the specific problem.

It also survived because acne is genuinely frustrating to treat quickly. Pimples don’t respond to anything overnight in a dramatic way, proper spot treatments included, so people keep experimenting, and a trick that occasionally coincides with a pimple naturally settling down on its own gets credited with the improvement.

Reading a toothpaste label before you consider this trick

If you’re tempted anyway, at minimum check the label. Plain white paste without added whitening crystals, strong mint oil concentrations or peroxide bleaching agents is somewhat less harsh than a whitening gel, though still not designed for skin. Whitening toothpastes, charcoal toothpastes and anything marked “sensitivity relief” with added chemicals carry a higher irritation risk on facial skin specifically because they’re formulated to be more active, not less.

For a broader look at everyday breakouts, see our home remedies for pimples and oily skin guide, and if the concern is a burn rather than a pimple, our piece on kitchen burn first aid explains exactly why toothpaste is the wrong answer there too. Browse more myth-busting breakdowns in Routine Autopsy. Within this batch, if you’re curious about another face-related viral trend, our take on mewing and “hunter eyes” covers similar ground on separating hype from what actually changes.