Syphilis is caused by bacteria and is spread during sex, including oral sex.
What are the symptoms?
Although half of those infected show no symptoms, some may develop infectious sores. These sores may be painless. They may clear up on their own but symptoms such as a rash may develop later.
If left untreated, syphillis can lead to serious health problems, eg damage to the heart, brain and nervous system.
Syphilis can be easily diagnosed and treated with antibiotics. If left untreated, it can lead to serious health problems, eg damage to the heart, brain and nervous system.
Find out more about syphilis.
If you are worried that you have an STI, you can get tested at your nearest clinic. You can find contact details at:
You can also find out more about sexual health services in your area at: