Syphilis is another bacterial infection. It often goes unnoticed in its early stages.
The first symptom to appear is a small round sore, known as a chancre. It can develop on your genitals, anus, or mouth. It’s painless but very infectious.
Later symptoms of syphilis can include:
- rash
- fatigue
- fever
- headaches
- joint pain
- weight loss
- hair loss
If left untreated, late-stage syphilis can lead to:
- loss of vision
- loss of hearing
- loss of memory
- mental illness
- infections of the brain or spinal cord
- heart disease
- death