How to Introduce New Products Without Flares

Introducing any new product to rosacea-prone skin can feel like a gamble. The skin's compromised barrier and heightened sensitivity mean that even products labelled "for sensitive skin" can cause stinging, burning, or a flare-up.

Why do new products sting?

Stinging or burning on application is a sign of a compromised skin barrier. Rosacea-affected skin has microscopic cracks in its protective outer layer, which allows ingredients to penetrate too deeply and stimulate nerve endings, causing the sensation of irritation. Common culprits include fragrances, alcohols, essential oils, and even some active ingredients like acids or retinoids.

How to patch test and slow-introduce safely?

Before applying a new product to your entire face, always patch test. Apply a small amount to a small area, such as the back of the cheek or jawline, for 3-5 days. If no redness or irritation occurs, you can proceed. Introduce a small amount of the product to your face just 2-3 times a week at first, gradually increasing the frequency over several weeks as your skin adapts. This gives your skin time to build tolerance and minimises the risk of a major flare.

How can I help

I see patients in person in central London. An in person consultation allows me to examine the skin directly including features that are difficult to capture in a photograph such as 3-dimensional changes and textural change. This is the better option where the diagnosis is uncertain, where previous treatment has not been effective, or where a procedure is being considered. For more straightforward conditions such as acne and rosacea a remote consultation with clear photographs can be a good option.

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Dr Magnus Lynch

About Dr Magnus Lynch

MA(Cantab) DPhil(Oxon) MRCS FRCP

I am a London-based Consultant Dermatologist and Dermatological Surgeon. I am highly experienced in skin cancer diagnosis, Mohs micrographic surgery, acne, rosacea, acne scarring and laser treatments. I studied at the Universities of Cambridge and Oxford, and completed my dermatology training and Mohs fellowship at the prestigious St John's Institute of Dermatology. I graduated from medical school in 2003 and have worked exclusively in Dermatology since 2012.

I lead a research team at King's College London investigating the molecular biology of skin cancer. In recent years I have been involved in Media Appearances, including the Channel 5 series 'Skin A&E', where I perform skin surgeries and treat various skin conditions.

My NHS practice is at Guy's Hospital. I consult with private patients at OneWelbeck (near to Bond Street station) and on Harley Street. Book A Consultation.

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I am available for consultations at several sites in Central London. Some conditions such as acne and rosacea are also suitable for a remote consultation with photos. Either enter your details and my practice management team will contact you within 1 working day or use instant online booking. Alternatively you can call or email directly. Please note that not all open clinic slots are visible on the instant booking link.

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