Genital Ulcers
๐ง Simple clinical clue: painful ulcers โ think HSV ๐ฅ.
painless ulcer โ think syphilis ๐งฌ until proven otherwise.
If the ulcer is atypical or not healing, consider non-infectious causes and malignancy.
๐ฆ Causes
- HSV-1/HSV-2 ๐ฅ - most common; painful ulcers/vesicles, dysuria, systemic symptoms in primary infection.
- Syphilis ๐งฌ - painless chancre + non-tender nodes; secondary syphilis can be systemic and subtle.
- Chancroid ๐ฆ - painful ragged ulcers (rare in UK).
- LGV ๐ - certain chlamydia serovars; ulcer + lymphadenopathy/proctitis in some groups.
- Non-infectious ๐ฟ - Behรงetโs, aphthous ulcers, drug reactions, trauma, malignancy.
๐ Clinical Tests
- Ulcer swab NAAT โ
for HSV; add chlamydia/LGV NAAT if relevant.
- Syphilis serology ๐งช (treponemal + RPR/VDRL).
- HIV test ๐ฉธ recommended for all with genital ulcers.
- Culture ๐งซ for chancroid only if epidemiology suggests.
- Biopsy ๐ฌ if persistent, atypical, or non-healing ulcer.
๐ Treatment
- HSV: aciclovir/valaciclovir (early treatment reduces symptom duration; consider suppression if recurrent).
- Syphilis: benzathine penicillin G (early syphilis) - follow guideline dosing; alternatives if allergic.
- LGV: doxycycline 100 mg BD for 21 days (specialist follow-up).
- Behรงetโs: specialist care (topical/systemic steroids, colchicine, immunosuppression).
- Partner notification ๐ค + STI screen; abstain until lesions healed.
โ ๏ธ Urgent referral: severe pain/urinary retention, extensive ulceration, pregnancy, immunosuppression, or suspected malignancy.