Symptom guide

Oral Lesions

Oral lesions may be caused by infection, trauma or other conditions.

Overview

Oral lesions can include ulcers, blisters or white patches. HSV, syphilis and non-infectious causes should be considered depending on appearance and history.

Possible causes

HSV-1
Syphilis
Aphthous ulcer
Other mucosal conditions

What to note before assessment

Note lesion duration
Avoid spicy or acidic foods if painful
Seek care if persistent

Key points

May be viral or bacterial
Appearance guides diagnosis
Persistent lesions need review
Sexual history may matter

When to seek care

New oral ulcer
Lesion with genital symptoms
Persistent white patch

Clear answers

Frequently asked questions

Can oral lesions be caused by an STI?

It can be associated with STIs, but many non-STI causes also exist. Symptoms alone cannot diagnose an infection.

Should I test immediately?

Testing timing depends on the concern and possible exposure. A clinician can advise whether testing now, later or after symptoms change is most appropriate.

Can symptoms have more than one cause?

Yes. Inflammation, skin conditions, urinary problems and infections can overlap. A careful history and examination help narrow the possibilities.

Keep learning

Related guides

Penile Discharge

Penile discharge can be caused by urethritis, infection or other conditions.

Vaginal Discharge

Vaginal discharge can be normal or a sign of infection or imbalance.

Urethral Discharge

Urethral discharge may indicate urethritis and should be assessed.

Genital Itching

Genital itching may be caused by infection, skin conditions or irritation.

Privacy and dignity

A respectful space for sensitive concerns

Sexual health questions can feel personal. The goal of every consultation is to provide clear medical information, explain options and support next steps without judgment, pressure or unnecessary disclosure.

Ask questions at your own pace.
Share only the information needed for safe care.
Request discreet communication where appropriate.
Bring a trusted support person if that helps.