- Occurs more commonly in females than males.
- Comedones are absent. Pustules are few.
- Round or oval white scars.
- Lesions are caused as a result of picking.
- Underlying psychological problems.
- Poor response to conventional acne treatment.
- Counselling or even antidepressants can help.
- Occurs equally in both sexes with a peak incidence of 13–16 years old.
- Face, chest, neck and back are affected.
- Comedones and pustules are common.
- Scarring and cysts may form in severe cases.
- Genetic factors are important in determining severity, duration and clinical pattern.
- No relation to diet or cleanliness. Lesions start as blocked infected follicles.
- OTC cleansers.
- Topical/oral antibiotics or benzoyl peroxide.
- Oral isotretinoin (Roaccutane, hospital only).
Contributed by Dr Nigel Stollery GP in Kibworth, Leicestershire and a clinical assistant in Dermatology at Leicester Royal Infirmary