What are the stages of syphilis?

Primary syphilis

* This is the first and most contagious stage of syphilis. It usually develops within 10–90 days (average 21 days) after exposure to the bacteria.

* A single, painless sore (called a chancre) appears at the site of infection. This is usually on the genitals or rectum, but it can also occur on other parts of the body, such as the mouth, lips, or fingers.

* The chancre typically lasts 2–4 weeks and then heals on its own. However, this does not mean that the infection is gone.

Secondary syphilis

* This stage usually begins 4–8 weeks after the chancre heals and can last for up to 2 years.

* Symptoms may include:

* A rash that starts on the trunk and spreads to other parts of the body

* Fever

* Fatigue

* Headache

* Sore throat

* Joint pain

* Loss of appetite

* Weight loss

* The symptoms of secondary syphilis can come and go over a period of months.

Latent syphilis

* This stage begins after the symptoms of secondary syphilis have gone away. It can last for up to 30 years.

* During latent syphilis, there are no symptoms of infection. However, the person is still contagious.

Tertiary syphilis

* This is the most severe stage of syphilis and can develop 20–30 years after the initial infection.

* Symptoms may include:

* Skin lesions that can break down and form ulcers

* Damage to the heart, blood vessels, brain, and other organs

* Paralysis

* Blindness

* Death

Congenital syphilis

* This is the form of syphilis that is passed from a pregnant woman to her unborn baby. It can cause serious health problems in the baby, including miscarriage, stillbirth, birth defects, and lifelong disabilities.