Pori
- Perioral dermatitis shows up as clusters of tiny red or skin-colored bumps around the mouth, nose or eyes, usually with a clear band of skin right next to the lips.
- Topical steroids, including over-the-counter hydrocortisone, are the best-known trigger; heavy occlusive creams, some toothpastes, fragrance and sunscreens can also aggravate it.
- Zero therapy means washing with water only and stopping most facial products; it can clear mild cases, though a rebound flare is common after stopping steroids.
- It clears slowly, over weeks to months, so see a dermatologist for diagnosis and treatment, especially if you're pregnant, a child has it, or it's near your eyes.
Perioral dermatitis is a rash of small red or skin-colored bumps, usually under 2 mm each, clustered around the mouth and sometimes beside the nose or eyes. A thin band of clear skin right next to the lips is a classic clue. It can itch, burn or flake. Topical steroid creams are the best-known trigger, and heavy creams and some toothpastes can make it worse.
Below is what the rash looks like on different skin tones, how it differs from acne and rosacea, the products most often linked to flares, and the "zero-therapy" approach dermatologists use as a first step. Treatment itself belongs with a doctor, so we finish with when to book that appointment.
What does perioral dermatitis look like?
It usually looks like a patch of tiny, acne-like bumps around the mouth. The American Academy of Dermatology (AAD) describes it as small, red, acne-like breakouts on lighter skin and skin-colored breakouts on skin of color, often with dry, flaky skin where the rash sits. Some people feel itching or burning; others feel nothing at all.
DermNet, the dermatology reference run by New Zealand dermatologists, lists the features doctors look for:
- Size and shape: clusters of skin-colored to red papules, small blisters and pustules, usually less than 2 mm each, which can merge into larger patches.
- The rim: a red base with a sharp border, while the skin immediately next to the lip line is often spared. That pale ring is one of the easiest ways to tell it apart from other rashes.
- Feel: burning or tightness is common; real pain is rare.
- Spread: more severe cases can reach the chin, cheeks, eyelids, forehead and the area between the eyebrows.
Because the rash can show up around the eyes and nostrils too, doctors increasingly call it periorificial dermatitis. The AAD notes that the rash is not contagious, wherever it appears.
Who tends to get it?
According to DermNet, it is slightly more common in lighter-skinned women and usually affects those aged 20 to 45, and it also appears in young children, often between 7 months and 13 years old.
Is it perioral dermatitis or acne?
The quickest tell is that perioral dermatitis has no blackheads or whiteheads. DermNet points out that comedones, nodules and cysts are features of acne, not of perioral dermatitis. Rosacea and seborrheic dermatitis are the other common lookalikes. This table draws on the differences DermNet lists for each condition; a dermatologist makes the final call.
| Condition | Where it shows up | What the bumps look like | Useful clue |
|---|---|---|---|
| Perioral dermatitis | Around the mouth, nostrils, sometimes eyes | Tiny papules and pustules, under 2 mm, on a red base | A clear rim of skin next to the lips; often follows steroid cream use |
| Acne | Face, chest, back | Blackheads, whiteheads, papules, sometimes nodules or cysts | Comedones are present |
| Rosacea | A different spread across the face | Redness and bumps | People are often older; complications such as a thickened nose don't occur in perioral dermatitis |
| Seborrheic dermatitis | Scalp, hairline, eyebrows, nose folds, chest | Greasy, flaky scale on pink or discolored skin | Involves the hairline and scalp, which perioral dermatitis does not |
| Contact dermatitis | Wherever a product touched | Red, itchy rash, sometimes blisters | Itch is often more intense |
If you are unsure which one you have, our guides to rosacea vs acne and common causes of facial redness cover the other patterns in more detail.
What makes perioral dermatitis worse?
Steroids applied to the face are the most common association, but the exact cause is still not understood. DermNet's leading theory is a weakened skin barrier: irritants get in more easily, the skin feels tight and dry, and people respond by applying more products, which leads to further irritation. That loop explains why so many triggers are things we put on our faces.
Topical steroids, including hydrocortisone
The AAD says many people develop this rash after applying a corticosteroid to their skin for too long, and that clearing it means stopping all corticosteroids on the skin, including over-the-counter hydrocortisone cream. DermNet adds that steroids by any route can be involved: creams, inhalers and nasal sprays. If a doctor prescribed the steroid, ask them before stopping; don't quit a prescription on your own.
Expect a rebound. The AAD warns that the rash can worsen when you stop the steroid, and that going back to the cream only brings temporary relief before the next flare. DermNet notes that a rebound flare can be severe after abruptly stopping a potent steroid on the face, which is one reason a doctor may taper you off instead. Steroids are also hard on facial skin in general: the AAD notes that skin thinning is more likely when a high-potency corticosteroid is applied to the face or neck.
Heavy creams and occlusive ointments
Rich, occlusive products can backfire here. DermNet lists occlusive emollients that overhydrate the skin, such as paraffin or petroleum-based products, as a risk factor and advises avoiding occlusive creams and ointments while the rash is active. That is the opposite of the advice for eczema, so a "slugging" routine that helps dry skin may not suit this rash. Our piece on petrolatum and slugging explains when occlusion helps.
Toothpaste and the fluoride debate
Both the AAD and DermNet name toothpaste as a possible irritant. The AAD lists a skin care product or toothpaste among things that may irritate the skin, and DermNet lists toothpaste and dental fillings among allergens and irritants. Online advice often singles out fluoride specifically. The sources we checked name toothpaste in general without pinning the problem on one ingredient, so a toothpaste switch is a reasonable experiment to discuss with your dentist or dermatologist, with no guarantee it helps.
Other aggravators
- Sunscreen: DermNet notes sunscreen use, especially physical sunscreens in children, as a possible factor.
- Fragrance and allergens: the AAD says an allergy to something touching your skin is possible. Fragrance is one of the most common causes of allergic contact reactions. See our guide to fragrance and essential oils in skincare.
- Hormones: flares linked to oral contraceptives, pregnancy and the premenstrual phase have been observed.
- Weather: UV light, heat and wind seem to worsen it.
What is the zero-therapy approach?
Zero therapy means stopping nearly everything you put on your face and letting the skin settle. DermNet says it should be used for all patients and may fully clear mild cases. The steps it describes:
- Stop facial cosmetics and topical products, including sunscreens and moisturizers, where possible.
- Wash with warm water alone until the rash clears, then consider a gentle non-soap cleanser.
- Use a bland, additive-free moisturizer only if dryness is uncomfortable, and skip occlusive creams and ointments.
- Switch to a gel or liquid sunscreen if you need sun protection.
- Stop topical corticosteroids, with your doctor's guidance if they were prescribed.
- Keep medically necessary inhalers and nasal sprays. Rinsing your face and mouth after using them may help, according to DermNet.
When you start reintroducing products, add one at a time and give each a week or two. The AAD suggests that people with this rash may need a mild, fragrance-free cleanser, very gentle washing and fragrance-free skin care. A patch test on a small area first is a sensible habit; our patch-testing guide walks through it.
How long does it take to clear?
Slowly. The AAD says to expect gradual improvement over a few weeks to a few months. Without treatment, DermNet says the rash can run a variable course for months or even years, though it rarely scars.
When should you see a doctor for perioral dermatitis?
See a doctor or dermatologist if the rash doesn't improve after a few weeks of zero therapy, if it spreads, if it is near your eyes, or if it started after a prescribed steroid. Also book a visit if you are pregnant, if a child has the rash, or if you are not sure what it is. A dermatologist usually diagnoses it by looking, and may swab or patch test to rule out infection or allergy.
Treatment is a medical decision, and we won't give doses here. For context, the AAD says dermatologists often prescribe an antibiotic such as tetracycline or erythromycin, and some patients need other medicines. DermNet describes treatment courses that usually run 4 to 8 weeks, with erythromycin as a first-line option for pregnant women and children under 8. Recurrence can happen if treatment stops too early, so follow the full plan.
How can a selfie scan or ingredient scanner help?
A rash that clears over weeks is hard to judge in the mirror, and the products you stopped are easy to forget by the time you reintroduce them. A consistent photo record helps with the first problem. Pori takes a selfie and returns an overall skin score plus breakdowns such as Pigmentation & Tone and Pores & Texture, so you can compare the same lighting week to week, and its skin diary lets you note sleep, stress and what you changed.
For the second problem, Pori's ingredient scanner (part of Pro) reads a barcode or a photo of the label and flags each ingredient as beneficial, use with caution or avoid for your skin type, using fixed rules over about 250 common ingredients. That makes it easier to spot fragrance or heavy occlusives before a product goes back on your face. Pro costs $9.99 a week or $49.99 a year in the US as of October 2026; the download and first scan are free.
An app is not a diagnosis. Pori can't tell perioral dermatitis from acne or rosacea, and it can't treat anything, so let a dermatologist confirm what the rash is.
Frequently asked questions
What does perioral dermatitis look like?
It looks like clusters of tiny red or skin-colored bumps, usually under 2 mm, around the mouth and sometimes the nose or eyes. The skin right next to the lips often stays clear, and the area can be dry, flaky, itchy or burning.
How do I know if it's perioral dermatitis or acne?
Perioral dermatitis doesn't have blackheads or whiteheads, while acne does. It also tends to stay around the mouth, nose and eyes with a clear rim by the lips. A dermatologist can confirm which one you have.
Can steroid cream cause perioral dermatitis?
Yes. The American Academy of Dermatology says many people develop it after using a corticosteroid on the skin for too long, including hydrocortisone. Stopping often causes a temporary flare, so ask your doctor before stopping a prescribed steroid.
Does toothpaste cause perioral dermatitis?
Toothpaste is listed as a possible irritant by both the AAD and DermNet. The sources don't single out one ingredient such as fluoride, so switching toothpaste is an experiment to discuss with your dentist or dermatologist, with no guarantee it helps.
How long does perioral dermatitis take to go away?
It usually improves gradually over a few weeks to a few months. Without treatment it can come and go for months or longer, so see a dermatologist if zero therapy isn't helping after a few weeks.
Is perioral dermatitis contagious?
No. The American Academy of Dermatology says you cannot catch it from someone else, wherever it appears on the body.
Sources
Pori is a wellness and skincare education app, not a medical device. This article is for general information and isn't medical advice. For anything that worries you, see a dermatologist.
