Penile Ulcers: 7 Real Causes, Symptoms & Fast Treatment (2026 Guide)

A penile ulcer is an open sore on the penis. It can have several causes, including infection, irritation, inflammatory skin disease, injury and, rarely, cancer. Appearance, pain or the number of sores cannot reliably identify the cause without examination and appropriate testing.

When to seek assessment

Arrange a GP or sexual-health clinic assessment for any unexplained sore, ulcer, lump, rash or change that persists. Seek prompt help for severe pain, difficulty urinating, rapidly spreading redness or swelling, fever, significant bleeding or feeling very unwell. Do not delay because of embarrassment; these services routinely assess genital symptoms.

Testing and treatment

A clinician may ask about symptoms and sexual contact, examine the area and take a swab, urine or blood sample. Treatment depends on the diagnosis. Do not apply leftover antibiotics, steroids, acids or unverified remedies because they can irritate tissue or obscure findings.

Avoid sexual contact until assessed if an STI may be possible, and follow advice about testing and partners. Read the NHS penis lumps and spots guide and STI information. For a Revitalize enquiry, use the contact route; the current contracted clinician and facility must be confirmed.

General information only; it does not diagnose a genital sore.