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Males with genital skin disease may present to clinicians in primary care, dermatology, genitourinary medicine, or urology clinics. Male genital dermatoses encompass a wide variety of skin lesions and rashes, some of which are limited to the genital area whereas others, such as psoriasis, can be part of a more generalised skin disorder. Genital skin disease can impact on the physical, psychological, and sexual wellbeing of men. Some dermatoses are precancerous, and cancer of the penis is associated with morbidity and mortality and litigation.1 This clinical update provides a guide to normal anatomical variations of the penis, how to recognise and manage common benign male genital dermatoses, and when to refer for specialist opinion. #### Sources and selection criteria We searched PubMed and Google Scholar for clinically relevant studies (Jan 2000 to Jul 2016), and the Cochrane Library, using the search terms “Balanitis”, “Balanoposthitis”, “Penile Dermatoses”, “Genital Dermatoses”, along with terms specific to each condition. We consulted the Cochrane Library, National Institute for Health and Care Excellence, British Association of Dermatologists, and British Association for Sexual Health and HIV for guidelines. Patients may be asymptomatic or describe pruritus, soreness, pain, dyspareunia, splitting of the foreskin, non-retractile foreskin (phimosis) or foreskin fixed in retraction (paraphimosis), scaling, erosion, and ulceration.2 3 The foreskin is a delicate tissue that is in close contact with urine, sweat, moisture, sexual secretions, desquamative products, detergents, potential allergens, and microbes. These factors may expose the foreskin to general irritation, pain, and dysfunction (eg, paraphimosis or phimosis, dribbling of urine, dyspareunia).3 4 Further progression of infection and inflammation can cause scarring, disfigurement, and, rarely, precancerous or cancerous lesions. Most men presenting to a specialist male genital dermatology clinic are uncircumcised.5 Circumcision protects men from inflammatory genital dermatoses, including psoriasis, seborrhoeic dermatitis, lichen planus, and lichen sclerosus.5 Predisposition to …