How is acne classified?

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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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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