How to manage rosacea — what helps, what triggers it, and what makes it worse.

Rosacea is one of the most common skin conditions in adults, and one of the most frequently mismanaged. It is often treated as a category of "sensitive skin" and managed accordingly — with the same broad-avoidance approach used for reactive or allergy-prone skin. This framing is incomplete, and it leads to choices that miss the mechanisms driving the condition.

What rosacea is

Rosacea is a chronic inflammatory skin condition characterised by vascular dysregulation and, in some presentations, papulopustular lesions. It is not acne, though the two can co-occur and are sometimes confused.

There are four recognised subtypes, often overlapping in the same person:

Erythematotelangiectatic rosacea (ETR) — persistent redness, flushing, visible blood vessels (telangiectasia), and stinging or burning. The most common presentation.

Papulopustular rosacea (PPR) — red bumps and pustules resembling acne, often on the central face. Unlike acne, there are no comedones. This subtype has the strongest evidence base for topical treatments.

Phymatous rosacea — skin thickening and textural change, most commonly affecting the nose (rhinophyma). More common in men.

Ocular rosacea — affects the eyelids and eyes, causing dryness, irritation, and redness. Often occurs alongside other subtypes without being recognised.

Why rosacea flares

Rosacea is driven by chronic, low-grade inflammation — and flares are typically triggered by stimuli that temporarily increase vascular activity, inflammation, or both.

Common triggers include:

• UV exposure (the most consistent and impactful trigger)
• Heat — hot environments, hot drinks, hot showers, exercise-induced core temperature rise
• Alcohol, particularly red wine and spirits
• Spicy foods
• Emotional stress
• Certain skincare ingredients — fragrance, alcohol, high-concentration acids, some preservatives

Triggers vary significantly between individuals. A personal trigger log — a simple record of what preceded a flare — is the most reliable way to identify which stimuli matter for a specific person. Not everyone reacts to spicy food; not everyone reacts to wine. Blanket avoidance of all common triggers is unnecessary if only a subset reliably causes flares.

Skincare for rosacea

The goal is a routine that maintains the barrier, reduces inflammatory load, and does not introduce further irritation. This means:

A gentle, low-pH cleanser. Rosacea-prone skin is often sensitised and may have a compromised barrier. Foaming cleansers with high pH or harsh surfactants strip the skin and increase reactivity. A mild, non-foaming or low-foam cleanser that rinses cleanly without residue is the starting point.

Niacinamide. Niacinamide has anti-inflammatory activity and supports the skin barrier. It does not address vascular dysregulation directly, but consistent use at 4–5% reduces overall skin reactivity and redness over weeks. It is well tolerated by most rosacea presentations.

Azelaic acid. Azelaic acid has Level I evidence for papulopustular rosacea at prescription concentrations (15–20%). It reduces redness, bumps, and pustules through anti-inflammatory and mild antibacterial activity. It is available OTC at 10% in some markets, with meaningful clinical benefit. Unlike many actives, azelaic acid does not significantly increase photosensitivity. It is one of the better-supported topical options available without a prescription.

Centella asiatica and green tea extract. These botanical actives have anti-inflammatory mechanisms with meaningful evidence in rosacea — centella especially for barrier repair. They lack the same evidence strength as azelaic acid but are well tolerated and provide useful supporting activity.

Mineral SPF. Daily broad-spectrum sunscreen is the single most important intervention for rosacea management. UV is the most consistent trigger, and the photoageing that UV drives compounds over time with rosacea-related vascular changes. Mineral (zinc oxide) formulations are generally better tolerated than chemical filters for reactive, rosacea-prone skin.

What to avoid

High-concentration exfoliating acids. Glycolic acid at standard concentrations (10–15%) frequently triggers flushing and irritation in rosacea-prone skin. If exfoliation is needed — for texture or hyperpigmentation — mandelic acid is better tolerated. Low-concentration lactic acid at 5–7% may also be tolerated in stable periods.

Fragrance and essential oils. Common contact irritants and allergens that can trigger or worsen inflammatory responses.

Alcohol-based products. Drying and irritating; can destabilise the barrier and increase reactivity.

Retinoids at introduction. Retinoids cause an initial retinization response — irritation, peeling, redness — that can significantly worsen rosacea flares. If retinoids are appropriate (they can be, eventually, for photoageing concerns), they should be introduced at very low frequency, very low concentration, and only in periods of stable skin. Azelaic acid is often a more practical first-line active.

Physical exfoliants and scrubs. Mechanical friction can trigger or worsen flushing. Chemical exfoliation at appropriate concentrations is better tolerated than physical.

The core principle

Rosacea is managed, not cured. The aim is to reduce the frequency and severity of flares through trigger management and a supportive routine, while treating active inflammation with the most evidence-based topicals available.

Daily SPF. Gentle cleansing. Niacinamide for barrier and inflammation. Azelaic acid if papulopustular symptoms are present. Trigger identification and avoidance where practical. That is the foundation.

Everything else — adding actives, progressing treatments — comes after that foundation is stable. Rosacea-prone skin is not fragile by nature; it is reactive. A consistent, undramatic routine tends to settle it far more effectively than an ambitious one.