Syphilis Stages

Syphilis stages describe how the infection unfolds over time, and each stage has its own set of signs. The disease moves through primary, secondary, latent, and tertiary phases, and without treatment it can take years to progress. The primary stage usually begins with a single painless sore called a chancre at the site of infection, which appears about three weeks after exposure. The secondary stage brings a rash, often on the palms and soles, along with other symptoms. Then the infection enters a silent latent phase that can last for years. Understanding the stages helps you recognize when testing and treatment matter most, since syphilis is curable at every stage.

Primary Syphilis

The primary stage starts with a chancre, a firm, round, painless sore at the spot where the bacteria entered the body. It usually appears about three weeks after exposure, though the range is ten to ninety days. The sore can be on the genitals, anus, mouth, or lips, and because it is painless it is easy to miss.

The chancre lasts three to six weeks and heals on its own even without treatment. That healing can mislead people into thinking the problem is gone, but the bacteria remain in the body and the infection moves to the next stage.

Secondary Syphilis

Secondary syphilis usually begins a few weeks after the chancre heals, often with a rash that can cover the body. A distinctive sign is a rash on the palms of the hands and soles of the feet, which is unusual for most other rashes. Other symptoms include fever, sore throat, fatigue, swollen lymph nodes, and patchy hair loss.

These symptoms can come and go over weeks or months. Like the primary chancre, they can fade without treatment, which again makes the infection easy to dismiss. The secondary stage is highly contagious, and the rash itself can transmit the bacteria through skin contact.

Latent Syphilis

After the secondary stage, syphilis enters a latent phase where there are no symptoms at all. This stage can last for years, and the only way to know the infection is present is through a blood test. Latent syphilis is divided into early latent, within the first year, and late latent, after that.

During the first year, the infection can still be passed to partners, though the risk drops over time. Without treatment, some people stay in the latent stage for life, while others progress to the most serious stage. Testing during latency is how most cases are found.

Tertiary Syphilis and Testing

Tertiary syphilis is the most serious stage and can develop years or even decades after the initial infection. It is rare today because most cases are caught and treated earlier. When it does occur, the bacteria can damage the heart, blood vessels, brain, and nervous system.

Tertiary syphilis is not contagious, but the damage it causes can be permanent. This is why early testing matters so much. A simple blood test at any stage can detect the infection, and antibiotics can stop the disease from progressing.

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