GPAtlas🧭 When to suspect
Balanitis is inflammation of the glans penis. When the foreskin (prepuce) is also inflamed the correct term is balanoposthitis, though “balanitis” is used loosely for both. It is common – affecting roughly 3–11% of males in their lifetime – and occurs almost exclusively in the uncircumcised, where the warm, occluded sub-preputial space favours irritation and infection.
The clinical task in primary care is twofold: work out the cause (irritant, candidal, bacterial, anaerobic, or an underlying dermatosis), and never miss the dangerous mimics – the two surgical emergencies (paraphimosis and necrotising fasciitis) and the premalignant/malignant lesions (lichen sclerosus and penile cancer). Most cases are simply irritant dermatitis or Candida, and most settle with hygiene measures and a short course of topical treatment.
Recognising the pattern guides treatment more than any test. The appearances below are the high-yield discriminators.
| Cause / type | Clinical clue – what you see |
|---|---|
| Irritant / contact dermatitis | The commonest cause; soreness and itch after soap, shower gel, bubble bath, baby wipes, latex condoms or lubricant. |
| Candida | Itchy blotchy erythema with small red satellite papules, or dry dull-red patches; suspect diabetes if recurrent. |
| Anaerobic (incl. Gardnerella) | Foul-smelling sub-preputial discharge with oedema and tender inguinal nodes. |
| Aerobic / bacterial (Group A/B strep, S. aureus) | Uniform erythema and oedema; may be erosive, painful and purulent. |
| Herpes simplex (HSV) | Grouped vesicles on an erythematous base that rupture into painful shallow grey ulcers; often recurrent. |
| Lichen sclerosus (BXO) | White, atrophic, scarred glans/foreskin, often with phimosis; premalignant. |
| Zoon’s (plasma cell) balanitis | Shiny, well-defined, glistening orange-red patch; now regarded as part of the male lichen sclerosus spectrum. |
| Psoriasis / circinate balanitis | Well-demarcated scaly or moist plaques; look for psoriasis elsewhere or reactive arthritis. |
| Penile intraepithelial neoplasia / SCC | A persistent, fixed, indurated plaque, ulcer or mass that does not settle with treatment. |
Raise suspicion particularly in uncircumcised men, those with phimosis or poor hygiene, and where there is diabetes mellitus, obesity or immunocompromise. In an older man with a non-resolving lesion, keep malignancy in mind.
Source: European balanoposthitis guideline · DermNet
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