How is acne classified?

By Dr Magnus Lynch
MA(Cantab) DPhil(Oxon) MRCS FRCP
Consultant Dermatologist & Dermatological Surgeon

Acne is classified according to the severity and the types of lesions that are present.

There are specific tools for assessing acne severity, such as the Leeds acne scale, however in practice a global assessment of mild, moderate or severe is often used. Understanding the severity of your acne helps determine the right treatment.

Mild acne is predominantly associated with whiteheads and blackheads, although you occasionally experience papules and pustules. Mild acne is not typically associated with pustules, nodules or scarring.

Moderate acne is characterized by widespread whiteheads and blackheads with numerous papules and pustules. Whilst there may be some mild scarring, it is not generally associated with nodules or severe scarring.

Severe acne is associated with multiple painful papules, pustules and nodules and can result in significant scarring.

When the majority of acne lesions (see our post on the types of lesions) are either whiteheads or blackheads, acne is described as comedomal. Papules, pustules, nodules or cysts reflect inflammatory acne.

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About Dr Magnus Lynch

I am a London-based Consultant Dermatologist and Dermatological Surgeon. My NHS practice is at Guy's Hospital and is focused on Mohs micrographic surgery and the treatment of complex skin cancers. My private practice additionally focuses on laser treatments, regenerative dermatology, rosacea, acne, pigmentation and scarring. I have particular expertise in the diagnosis and treatment of skin cancer, including minimally-invasive techniques, Mohs micrographic surgery, and facial reconstructive surgery. 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 and skin cancer diagnostics, and I constantly aim to translate the latest findings into better patient care. You can learn more about my Research.

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. Filming for the next series has recently completed and the series will be released later in 2025.

How I can help

I consult with private patients at several well-appointed and conveniently located sites across central London:

• London Bridge Hospital: Conveniently situated within The Shard, next to London Bridge station.
• Skin55 Ltd: Located at 55 Harley Street, this beautiful Edwardian building houses one of the largest private dermatology facilities in the UK with a comprehensive laser suite.
• OneWelbeck: Located close to Bond Street underground station. Mohs surgery, lasers, and other skin surgeries are performed in the state-of-the-art surgical suite here.

A new consultation is £250, a follow up consultation is £220. For more information on fees, please visit Prices.