Can herpes simplex virus cause ulcerative lesions?

Can Herpes Cause Ulcers?

Yes, herpes simplex virus (both HSV-1 and HSV-2) definitively causes ulcerative lesions as a hallmark manifestation of infection. 1, 2

Mechanism of Ulcer Formation

The classic progression of herpetic lesions follows a predictable pattern 1:

• Initial stage: Redness and papular rash at the site of infection
• Vesicular stage: Clear fluid-filled vesicles containing thousands of infectious viral particles develop
• Ulcerative stage: Vesicles burst, forming shallow ulcers or erosions
• Healing stage: Ulcers crust over and heal spontaneously without scarring, typically within 7-10 days 2

On mucosal surfaces (genital, oral mucosa), ulcerative lesions are usually the only stage observed, as the vesicular stage is brief or not clinically apparent 2.

Clinical Presentations of HSV Ulcers

Orolabial Herpes (HSV-1)

• Ulcerative lesions on the lips following vesicle rupture 2
• Episodes last 7-10 days untreated 2
• Recurrences occur 1-12 times per year 2

Genital Herpes (HSV-1 and HSV-2)

• HSV is the most common cause of sexually acquired genital ulceration 1
• Ulcerative lesions on penis, buttocks, perineum in males 1
• Ulcerative lesions on genitals, buttocks, thighs in females 1
• May be accompanied by dysuria, discharge, and inguinal lymphadenopathy 2

Severe Disease in Immunocompromised Patients

• Extensive, deep, nonhealing ulcerations occur in profoundly immunocompromised patients 2
• Most commonly reported in patients with CD4+ counts <100 cells/µL 2
• May be prolonged by secondary bacterial infection or immunosuppression 1

Important Clinical Caveats

Laboratory confirmation is essential because clinical diagnosis alone is unreliable 1:

• Clinical differentiation from other causes of genital ulceration is difficult 1
• Other infectious causes include Treponema pallidum (syphilis) and Haemophilus ducreyi (chancroid) 1
• Non-infectious causes include Crohn disease, Behçet syndrome, and fixed drug eruption 1
• HSV and T. pallidum can occasionally be recovered from the same lesion 1

Most HSV infections are unrecognized clinically 2, 3:

• 80-90% of genital herpes cases progress subclinically 1
• Only 13% of HSV-2 seropositive persons have been diagnosed with genital herpes 3
• Many persons have mild and atypical lesions that are not brought to medical attention 2

Diagnostic Approach

When ulcerative lesions are present, pursue laboratory confirmation 2:

• HSV DNA PCR (most sensitive method) 2
• Viral culture 2
• HSV antigen detection 2
• Type the virus (HSV-1 vs HSV-2) as this affects recurrence frequency 2