Definition
A bacterial STI with multiple stages, sometimes silent for years.
Symptoms
Often a painless ulcer, later possible rash or swollen glands; signs vary.
How it may be discovered
Screening, a lesion or partner diagnosis.
When to seek care
Seek prompt care; pregnancy or visual, hearing or neurological symptoms needs urgent advice.
Investigations and tests
Blood tests, examination and stage-specific investigations.
Reaching a diagnosis
Interpret tests with history, including previous treatment.
Treatment options
Stage-appropriate antibiotics, blood-test follow-up and partner care; past treatment does not prevent reinfection.
Explore this topic further
Continue with related explanations of how the body works and treatment options.