Bumps only around the mouth: is it acne or perioral dermatitis?

Your forehead and cheeks are fine, but the skin around your mouth keeps flaring. Up close in the mirror there's a cluster of tiny bumps beside the nose and at both corners of the mouth, and just when it seems to be settling, the same patch comes back a few days later.

So you try an acne product, then more moisturizer, then whatever tube of cream is still in the drawer because it itches. The day after it looks a little calmer, and a few days later it's spread further than before. At that point the question isn't which product to use, it's what this actually is.

This article sets out how the two common changes around the mouth differ, why the better-then-worse pattern keeps repeating, and what a consultation establishes first.

This article organizes treatment information to STON Clinic standards. Individual results vary, and whether a treatment suits you is a decision to make with a board-certified dermatologist.

The Pattern of Bumps That Only Show Up Around the Mouth

The Pattern of Bumps That Only Show Up Around the Mouth

What clusters around the mouth has its own name. A dermatology reference states that periorificial dermatitis (POD) is a relatively common chronic inflammatory skin eruption. It preferentially targets cutaneous orifices as implied in its name ie, around the eyes, nostrils, mouth, and occasionally the genitals. The same page records that it usually affects young to middle-aged women aged 20 to 45, and that it's also seen in young children, often between seven months and 13 years old.

The shape is distinctive too. That page describes clusters of skin-coloured to red papules, vesicles and pustules, usually less than 2 mm each, which may coalesce into larger lesions. It also notes that the immediate peri-vermillion skin is often spared, and only rarely affected in severe cases.

It helps to have the basic picture of acne next to it. The same reference's acne page lists open and closed comedones* (blackheads and whiteheads) as one group of acne lesions, alongside papules described as small tender red bumps, pustules, and nodules described as large painful red lumps.

Comedone: a plugged pore, which shows at the surface as either a dark dot or a small white kernel

So there are two things to look at in the mirror first. Whether blackheads and whiteheads are mixed in, and whether the strip right beside the lip border is clear. Fairly often those two point in opposite directions.

The Pattern of Bumps That Only Show Up Around the Mouth

What Actually Separates Acne From Perioral Dermatitis

What Actually Separates Acne From Perioral Dermatitis

The literature's dividing line is the type of lesion. The dermatology reference, distinguishing POD from acne, notes that comedones, nodules, and cysts present which are not typical of POD. A picture with blackheads and whiteheads mixed in, plus deeper lumps you can feel, sits closer to acne.

Where each one begins differs as well. The same reference's explanation of acne states that sex hormones are converted in the skin to dihydrotestosterone, which stimulates sebaceous glands at the base of hair follicles to enlarge, and that inflammation and debris leads to blockage of the skin pores — forming comedones. The bumps of perioral dermatitis, by contrast, are described by their clustering around the facial orifices rather than by a plugged pore.

The border of the affected zone is another clue. A 2007 case description in a Canadian family medicine journal characterizes perioral dermatitis as groups of asymptomatic, occasionally scaly, skin-coloured, erythematous papules or papulopustules that predominantly surround the mouth while sparing the vermillion border of the lips. The same piece records involvement of the nasolabial area, the medial cheeks, and less commonly the eyelid area.

Side by side, the two look like this.

That last row is the point of this article. The Canadian journal piece records a cyclical pattern of improvement with steroid use and deterioration with steroid withdrawal in perioral dermatitis. The dermatology reference puts it even more plainly: steroid use via all routes, whether topical, inhaled or by nasal insufflation, is the most common association.

Why STON Clinic Starts With Everything Already Going On Your Face

Why STON Clinic Starts With Everything Already Going On Your Face

The first move in this consultation isn't recommending a product. It's establishing everything currently going onto your face: cleanser, moisturizer, sunscreen, makeup, any leftover tube of cream, and any inhaler or nasal spray in use. Photographing the containers at home is the most accurate way to bring that list in.

The reason that order matters is that the most common association in the literature lives in exactly that list. Without the name of the cream, the better-then-worse pattern has no explanation, and with no explanation the same pattern simply repeats.

Why STON Clinic Starts With Everything Already Going On Your Face

Then the current state goes into photographs. Front-on and both profiles under the same light, plus one close shot framed so the strip beside the lip border is visible. Bump size and distribution read differently under different lighting, so a reference image matters.

The direction of care gets separated out here too. The dermatology reference lists stopping all facial cosmetics and topical products and discontinuing all topical corticosteroids as treatment for POD, recommends tetracycline first-line with a response that's usually quick, and records a duration of usually four to eight weeks that may require an extension.

How a cream gets stopped, though, isn't something to decide alone. The cyclical pattern described in the Canadian journal piece overlaps with the days right after stopping. If you're currently using something prescribed, it's safer to settle the way you come off it with the prescriber or in a consultation.

How the Check and the Care Actually Run

How the Check and the Care Actually Run

Step one is sorting the shape. Are blackheads and whiteheads mixed in, are the bumps evenly small, is the strip beside the lip border clear? Those three are exactly the distinguishing points the literature sets out.

Step two is the list of products and medicines. Write down what has gone on your face over recent months, with dates. Since the reference states that the route doesn't matter, inhalers and nasal sprays belong on that list too even though they never touch the face.

Step three is setting the treatment frame. The dermatology reference starts with stopping everything applied to the face, and the 2007 Canadian piece records that topical forms of metronidazole, most commonly, along with erythromycin, adapalene or azelaic acid can be used. It also records a six- to 12-week course of systemic tetracycline antibiotics such as doxycycline, minocycline or tetracycline. Which of those apply, and which don't, is decided in consultation.

Step four is knowing the waiting stretch in advance. The dermatology reference notes POD usually runs a chronic variable course that may last months to years without treatment, and that with treatment most patients recover well. The 2007 piece likewise records that patients who have adequate treatment of perioral dermatitis have an excellent prognosis.

Step five is fixing the next look. The first days after stopping a cream can look redder, so pairing a photo from that stretch with a booked review date keeps the trend from being misread.

What to Put Together Before the Visit

What to Put Together Before the Visit

Start with the product list. Cleanser, moisturizer, sunscreen, makeup, creams: photograph them so the names are legible. Noting when you started each one and when you stopped makes the pattern visible.

Next, photographs. Keep a shot of the worst day and one of today, taken under the same light so they can be compared. A close frame showing the strip beside the lip border is particularly useful.

Last, the direction of change. Better than yesterday, the same, or spreading? If there's fever, rapid spread toward the eyes, or pain that keeps building, a medical appointment comes before a cosmetic consultation.