Rosacea: What Causes It, How a Dermatologist Tells It Apart from Acne and Eczema, Why Self-Treating Makes It Redder, and Treatment by Type

3 days ago

8 min read

Rosacea is a chronic inflammatory skin condition of the central face. It causes facial redness that comes and goes, visible tiny blood vessels, and in some people acne-like red bumps and pustules. It can be kept under control, but it is not a condition that can be “cured”. Importantly, it is often mistaken for acne, an allergic rash, or sensitive skin, so many people treat it the wrong way and end up worse. In this article, a dermatologist explains what rosacea is, how to tell it apart from other conditions, why some self-treatments make the redness worse, and which treatments have evidence behind them.

What exactly is rosacea?

Rosacea is a condition in which the immune system and the blood vessels of the facial skin react abnormally strongly to triggers, causing inflammation and repeated redness over the cheeks, nose, forehead, and chin, which make up the central face.

Typical features that suggest rosacea include:

Flushing when exposed to sun, hot weather, spicy food, or alcohol, which then gradually fades.
Persistent redness (persistent erythema), especially in the middle of the cheeks and the nose, which no longer fades as it used to.
Visible branching blood vessels (telangiectasia), seen as fine red lines on the cheeks or beside the nose.
Red bumps and pustules (papules/pustules) on a red background, but without blackheads or whiteheads (comedones).
Burning, itching, or skin that is sensitive to touch when applying cream or being out in the sun.

It is common in adults aged 30–50 and older. It is seen more often in women, but men tend to have more severe forms, especially on the nose.

Why do many people mistake it for “acne” or an “allergy to cream”?

This is the main reason rosacea so often gets the wrong treatment. The red bumps and pustules of rosacea look very much like acne, so many people (and many shops) call it “red-face acne” and treat it as full-blown acne, with scrubbing, exfoliating, strong spot treatments, or frequent face washing until the skin is dry and peeling. The result is a more damaged skin barrier, more inflammation, and a redder face.

The most important distinguishing points are:

Acne always comes with blocked pores such as blackheads and whiteheads (comedones), and usually has no background flushing.
Rosacea has no blocked pores, but has inflamed bumps on a “red background” that flushes easily, and often visible fine blood vessels.

Another common mix-up is thinking it is an “allergy to cream” or “sensitive skin”, then switching creams over and over or buying redness-reducing creams to use on your own, when the real cause is a chronic inflammatory disease that needs specific treatment, not just avoiding allergens.

How many types of rosacea are there?

Dermatologists divide the main presentations of rosacea into 4 patterns. One person can have more than one pattern at the same time, and the treatment approach differs for each.

Erythematotelangiectatic type — mainly flushing, persistent redness, and visible blood vessels. The skin is often stinging and easily irritated.
Papulopustular type — mainly acne-like inflamed bumps on a red background. This is the type most often called “red-face acne”.
Phymatous type — thickened skin and enlarged pores, especially on the nose (rhinophyma). It is seen more often in men.
Ocular rosacea — dry, burning, gritty eyes, red eyes, and inflamed eyelids. It sometimes appears before the skin symptoms, and if left untreated it can affect vision.

How is rosacea different from other conditions that look similar?

Because “facial redness” can come from many conditions, telling them apart correctly before treatment is the most important step. These are the conditions most often confused with rosacea.

Acne (Acne vulgaris) — has blackheads and whiteheads, can spread across the face, chest, and back, and rarely has background flushing.
Seborrheic dermatitis — redness with greasy scales in the folds beside the nose, the eyebrows, and the scalp. It tends to itch more than burn.
Contact dermatitis — red, itchy, swollen skin where an allergen touched the skin, usually with a history of changing products.
Perioral dermatitis — small red bumps around the mouth and nose, often linked to topical steroid use.
Lupus butterfly rash (SLE malar rash) — redness across the bridge of the nose in a butterfly shape, but it usually spares the folds beside the nose, has no pustules, and often comes with whole-body symptoms such as joint pain, fever, hair loss, and marked sun sensitivity. This group needs to see a doctor promptly for further tests.

Sometimes these cannot be told apart by eye alone. A dermatologist may use a skin camera (dermoscope) or order further tests to confirm, especially when lupus is suspected.

Why “treating it yourself makes it redder” — the steroid problem to watch for

A very common problem dermatologists see in Thai patients is applying steroid creams or mixed creams (whitening or redness-reducing creams of unknown ingredients) to a red face on their own. At first the face seems to improve because steroids suppress inflammation, but with continued use the following occurs:

Rebound redness when the cream is stopped (steroid-induced rosacea / topical steroid withdrawal) — when you stop applying it, the redness and burning are worse than before, so you go back to applying it again, in a repeating cycle.
Thinner skin, more prominent blood vessels, followed by perioral dermatitis.

The key principle is that rosacea should not be treated by continuously applying steroids on your own. Scrubbing, rubbing, and products containing alcohol, menthol, or strong fragrance also increase inflammation. The right treatment reduces inflammation with medicines suited to the type of disease, together with care of the skin barrier, rather than suppressing symptoms temporarily.

What triggers rosacea flare-ups?

Rosacea flares up in response to triggers that differ from person to person. Keeping a record of what makes your face flush will help you avoid your own triggers. Common triggers include:

Sunlight and heat — one of the leading triggers.
Very hot or very cold weather and sudden temperature changes.
Spicy food and hot drinks.
Alcohol, especially red wine.
Stress and strenuous exercise.
Irritating products such as alcohol, fragrance, scrubs, and strong acids.

How is rosacea treated according to its type?

The goals of treatment are to reduce inflammation, reduce redness, and lengthen the quiet periods, choosing methods according to the type and severity. All of this should be done under a doctor’s care, not by buying medicines to apply on your own.

1. The basics everyone needs to do

Care for the skin barrier gently — wash with a mild cleanser, with no harsh soap, twice a day, followed by a gentle, fragrance-free moisturizer.
Use sunscreen every day — SPF 30 or higher. Physical sunscreens (zinc oxide/titanium dioxide) are usually less irritating, because sun is a main trigger.
Avoid your personal triggers — based on the record you have kept.

2. Topical medicines (for the papulopustular type)

Metronidazole 0.75% — a standard anti-inflammatory topical that has been used for a long time.
Azelaic acid 15% — reduces inflamed bumps and redness.
Ivermectin 1% — applied once a day and effective for inflamed bumps. It works both by reducing inflammation and by reducing Demodex mites, which contribute to the disease. In several studies it was found to work and to last longer than metronidazole.
Microencapsulated benzoyl peroxide 5% (E-BPO) — a newer option for inflamed bumps, designed to be less irritating.

3. Redness-reducing medicines (for persistent redness)

Brimonidine 0.33% gel or Oxymetazoline 1% cream — topical medicines that temporarily constrict blood vessels and help reduce redness. They control the symptom but do not treat the underlying cause, and some people may get rebound redness, so they should be used as your doctor advises.

4. Oral medicines (for moderate to severe cases)

Low-dose doxycycline 40 mg (modified-release formulation) — the standard oral medicine, used for its “anti-inflammatory effect”, not its antibacterial effect, so it reduces the problem of antibiotic resistance. It has good-quality evidence behind it and helps control the disease over the long term.
In severe cases or the nose-enlargement type, a doctor may consider low-dose isotretinoin.

5. Lasers and IPL (for fine blood vessels and redness)

Vascular lasers such as the pulsed-dye laser (PDL) or IPL can reduce fine blood vessels and background redness well, but they are an add-on treatment that should be done after inflammation is under control. They do not cure the disease and usually need several sessions.

6. Ocular rosacea

This must always be managed alongside the skin. Treatment includes eyelid cleaning, eye drops, and, in some people, oral anti-inflammatory medicine. If you have red, burning, or irritated eyes, tell your doctor, as you may also need to see an eye doctor.

Can lasers cure rosacea?

The straight answer is no, they cannot cure it. Rosacea is a chronic condition that flares up from time to time. Lasers and IPL do reduce visible fine blood vessels and redness, but they do not stop the underlying inflammation. If triggers are not controlled and the inflammation is not treated as well, the symptoms will come back.

What can realistically be done is keeping the disease quiet and living well with it by caring for the skin barrier, using sunscreen, avoiding triggers, and using medicines suited to the type, with lasers as an add-on for redness and blood vessels, not the only answer.

Signs you should see a dermatologist

You should consult a dermatologist when:

You have persistent facial redness or inflamed bumps that have not improved with self-treatment or keep coming back.
You have used steroid creams or mixed creams on your face and the redness rebounds when you stop.
You also have eye symptoms such as dry, burning, irritated, or red eyes.
The nose or skin starts to thicken and become misshapen.
You have butterfly-shaped facial redness together with joint pain, fever, fatigue, hair loss, or marked sun sensitivity, which requires urgent evaluation for lupus.

Rosacea is diagnosed mainly by physical examination. Seeing a doctor early helps you get the right treatment for your type, avoid wrong treatment that makes symptoms worse, and plan long-term control that suits you.

Frequently asked questions about rosacea

How is rosacea different from acne?

Acne always comes with blackheads and whiteheads. Rosacea has no blocked pores, but has red bumps and pustules on a background of skin that is red and flushes easily, and often visible fine blood vessels. The two conditions are treated differently, and using strong acne medicines on rosacea can make it worse.

Can rosacea be cured?

Rosacea is a chronic condition with no cure, but it can be kept quiet so you can live normally, through skin care, sunscreen, avoiding triggers, and continued use of medicines suited to the type.

Why does it get redder when I apply a redness cream myself?

Many redness creams or mixed creams of unknown ingredients contain steroids, which suppress symptoms at first, but continued use leads to rebound redness when stopped (steroid-induced rosacea) and thinner skin. You should not apply steroids on your own to treat rosacea.

Is rosacea contagious?

No. Rosacea is not caused by a germ that spreads to other people, and it is not caused by dirt. Washing your face often or scrubbing hard actually makes it worse.

Is laser treatment for rosacea worth it?

Vascular lasers and IPL do reduce fine blood vessels and background redness, and suit an add-on treatment after inflammation is under control, but they do not cure the disease and usually need several sessions. Plan it with your doctor to suit the type of disease.

Written by Dr. Patara Voravutinon, Dermatologist · Last reviewed August 17, 2026