Summary
Syphilis is a sexually transmitted infection (STI) that can progress quickly if left untreated. The name of the disease comes from the New Latin “Syphilus,” a character from a poem who was said to be the first person to contract the disease.
Syphilis is caused by the bacterium Treponema pallidum, which is typically transmitted through sexual contact with an infected person. The bacterium cannot be spread through casual skin contact with an infected person.
Common symptoms of syphilis include the appearance of skin sores called chancres, muscle pain, fever, fatigue, hair loss, and sore throat. These symptoms can vary depending on the stage of the infection.
The infection is usually treated with antibiotics, most commonly penicillin. Early diagnosis and treatment are essential to prevent complications and the spread of the disease to others.
Table of Contents
Symptoms of Syphillis
Syphilis progresses through different stages, each with its own set of symptoms. The disease can develop over months or even years if left untreated, and the symptoms may vary depending on the stage of infection.
Primary Stage Symptoms:
- Chancre sores. The first symptom of syphilis is the appearance of one or more chancres. These are painless sores that typically appear about three weeks after the bacteria enter the body. They are usually found at the site of infection, such as the genitals, anus, or mouth. The chancres may heal on their own within 3 to 6 weeks, but if untreated, the infection will progress.
Secondary Stage Symptoms:
If syphilis is not treated during the primary stage, it will move to the secondary stage, where more widespread symptoms can develop:
- Itchy rash. A red or brown rash may appear all over the body, including the palms of the hands and soles of the feet. This rash may or may not itch.
- Wart-like sores. Lesions resembling warts may appear in the mouth, anus, or genital area.
- Fever. A persistent low-grade fever may develop.
- Sore throat. Many people experience throat pain or discomfort.
- Swollen lymph nodes. Lymph nodes in different areas of the body may become enlarged and tender.
- Muscle pain. Aching muscles and joints are common in this stage.
- Hair loss. Patchy hair loss or thinning of hair can occur during the secondary stage.
- Headaches. Frequent headaches may develop as part of the systemic infection.
- Weight loss. Some individuals experience sudden, unexplained weight loss.
- Extreme fatigue. Severe tiredness or weakness can occur as the body fights off the infection.
Latent Stage:
In the latent stage, syphilis becomes dormant and may show no symptoms for several years. Despite the absence of visible symptoms, the Treponema pallidum bacteria remain in the body, potentially causing long-term damage if untreated. This stage can last for 10 to 30 years, and the person remains contagious during the early part of this phase.
Tertiary Stage Symptoms:
If syphilis is still untreated after the latent stage, it can progress to the tertiary stage, which is more severe and life-threatening. The following symptoms may appear:
- Heart problems. The infection can damage the heart, leading to cardiovascular issues such as aneurysms and heart valve disease.
- Blood vessel complications. Syphilis can damage blood vessels, affecting blood circulation throughout the body.
- Liver damage. The liver may be affected, leading to weakness and serious health complications.
- Bone and joint disorders. Syphilis can weaken bones and cause joint pain, leading to potential deformities.
- Gummas. These are soft, tumor-like growths that can develop in various parts of the body, including the skin, bones, and internal organs, causing inflammation and tissue damage.
Recognizing these symptoms and seeking medical attention early is crucial for preventing the long-term and severe complications of untreated syphilis. Treatment with antibiotics is highly effective in clearing the infection and stopping its progression.
Diagnostic Procedures for Syphillis
Diagnosing syphilis involves a series of tests that can detect the presence of Treponema pallidum, the bacterium responsible for the infection. Here are the most common diagnostic procedures used by healthcare providers:
- Physical examination. The doctor will first examine any visible symptoms such as chancres (sores) or rashes, which are characteristic of the primary and secondary stages of syphilis. These signs provide early clues about a possible syphilis infection.
- Blood tests. Blood tests are the most reliable way to diagnose syphilis. There are two types:
- Nontreponemal tests (e.g., VDRL, RPR) screen for syphilis by detecting general antibodies produced by the body in response to the infection. These tests are used for initial screening and monitoring the effectiveness of treatment.
- Treponemal tests (e.g., FTA-ABS, TPPA) confirm the diagnosis by detecting antibodies specifically against Treponema pallidum. These tests are more specific and are used to confirm a positive nontreponemal test result.
- Darkfield microscopy. If active sores (chancres) are present, the healthcare provider may take a sample from the sore and examine it under a darkfield microscope. This allows for the direct visualization of the syphilis bacteria, which is useful for confirming primary syphilis.
- Cerebrospinal fluid (CSF) analysis. If late-stage syphilis is suspected, especially if there are neurological symptoms, a lumbar puncture (spinal tap) may be performed to collect cerebrospinal fluid. This test checks if the infection has affected the brain or nervous system, a condition known as neurosyphilis.
- Prenatal screening. Pregnant women are routinely tested for syphilis during prenatal visits to prevent congenital syphilis. A blood test can detect the infection early, helping protect the baby from severe complications.
Early diagnosis is crucial for effective treatment. Syphilis is treatable with antibiotics, most commonly penicillin, especially when caught early. Regular screenings, particularly for sexually active individuals, are essential for preventing complications and ensuring successful recovery.
Complications of Untreated Syphillis
If syphilis is left untreated, it can lead to severe and potentially life-threatening complications as the infection progresses through its various stages. Here are some of the most serious complications:
- Neurosyphilis. Syphilis can spread to the brain and nervous system at any stage of the infection, leading to neurosyphilis. This can cause headaches, vision problems, muscle coordination issues, memory loss, confusion, and, in severe cases, dementia.
- Cardiovascular syphilis. In its later stages, syphilis can damage the heart and blood vessels, leading to conditions such as aortic aneurysm (bulging of the aorta), aortic valve disease, and heart failure, which can be life-threatening.
- Gummatous syphilis. In the tertiary stage, soft, tumor-like growths called gummas can form in the skin, bones, liver, or other organs. These growths can cause severe tissue damage and organ dysfunction.
- Bone and joint damage. Syphilis that progresses to its tertiary stage can cause chronic pain and deformities in the bones and joints, making movement difficult and reducing quality of life.
- Vision and hearing loss. Untreated syphilis can lead to vision problems, including blindness, and hearing loss. These complications occur when the infection affects the eyes (ocular syphilis) or ears.
- Congenital syphilis. If a pregnant woman has syphilis, the infection can be passed to her baby during childbirth. This can result in serious health issues for the baby, including developmental delays, bone deformities, seizures, or even stillbirth.
- Organ damage and death. In its final stage, untreated syphilis can cause widespread damage to vital organs, such as the liver, kidneys, and brain. This damage can lead to long-term health problems and may result in death.
To prevent these serious complications, it is crucial to seek treatment as soon as syphilis is diagnosed. Early treatment with antibiotics can stop the progression of the disease and prevent long-term damage.
Causes of Syphillis
Syphilis is primarily caused by the bacterium Treponema pallidum. This bacterium is most commonly transmitted through direct contact with syphilitic sores, known as chancres, during sexual activity. These sores can be found on the genitals, anus, rectum, lips, or mouth. The bacterium enters the body through small cuts or abrasions in the skin or via mucous membranes.
It’s important to note that syphilis is highly contagious during its primary and secondary stages, as well as at the onset of the latent stage. Transmission typically occurs through vaginal, anal, or oral sex. Here are the key ways syphilis can be transmitted:
- Direct contact with syphilitic sores. During sexual activity, contact with an infected person’s sores allows the bacterium to enter the body. Even if the sores are not visible, syphilis can still be transmitted.
- From mother to child during pregnancy or childbirth. Syphilis can be passed from an infected mother to her baby during pregnancy or delivery, resulting in congenital syphilis, which can cause serious health problems for the newborn.
Additionally, it’s essential to understand that syphilis can reoccur. Even if someone has been treated and cured, they can be infected again if they come into contact with the bacterium in the future. Unlike some infections, recovering from syphilis does not provide immunity, meaning reinfection is possible if exposed again.
Practicing safe sex, getting regular screenings, and seeking prompt treatment are crucial in preventing the spread and complications of syphilis.
Prevention of Syphillis

Syphilis can be effectively prevented by practicing safe sex and taking precautions to avoid contact with infected individuals. Here are some key ways to prevent syphilis:
- Abstaining from sex, especially if unsure of a partner’s health status. Avoiding sexual activity is the most reliable way to prevent syphilis, particularly when you’re unsure about your partner’s sexual health or whether they have any sexually transmitted infections (STIs).
- Engaging in a long-term monogamous relationship with an uninfected partner. Being in a mutually faithful relationship with one partner who has tested negative for syphilis significantly reduces the risk of contracting the disease.
- Using condoms during sex. Consistently using condoms during vaginal, anal, or oral sex helps prevent syphilis by reducing direct contact with infectious sores. While condoms provide good protection, they may not fully eliminate the risk if the sores are located in areas not covered by the condom.
- Avoiding oral sex. Syphilis can also be transmitted through oral sex if one partner has open sores in or around the mouth or genitals. Limiting oral sex or using protection, such as dental dams, can reduce the risk of transmission.
- Avoid sharing or borrowing sex toys. If using sex toys, it’s important not to share them with others unless they are thoroughly cleaned between uses. Bacteria can survive on these items and transmit syphilis between users.
- Remember that reinfection is possible. Even if you have been treated and cured of syphilis before, you can become infected again if exposed to the bacterium. Staying vigilant and continuing to practice safe sex is crucial for long-term prevention.
By following these preventive steps, you can significantly reduce your risk of contracting syphilis and protect yourself and your partners from potential health complications. Regular testing and open communication about sexual health are key to preventing the spread of sexually transmitted infections.
Risk Factors for Syphillis
Several factors can significantly increase the risk of contracting syphilis, especially in sexually active individuals. These include:
- Engaging in unprotected sex. Having sex without using protection, such as condoms, greatly increases the risk of contracting syphilis. Condoms can help prevent the transmission of Treponema pallidum, the bacterium responsible for syphilis, by blocking contact with infected sores.
- Having multiple sexual partners. The more sexual partners a person has, the higher the likelihood of coming into contact with someone who is infected with syphilis. This is particularly true if the individual’s partners have not been tested for sexually transmitted infections (STIs).
- Men who have sex with men (MSM). Men who engage in sexual activity with other men are at a higher risk of contracting syphilis. The MSM community has shown higher rates of syphilis infection in recent years, largely due to unprotected sexual practices and overlapping networks of sexual partners.
- Having HIV. Individuals who are living with HIV have a higher risk of acquiring syphilis. HIV weakens the immune system, making the body more susceptible to other infections. Additionally, people with HIV and syphilis are more likely to experience severe complications from both diseases.
Understanding these risk factors is important for reducing the chances of contracting syphilis. Practicing safe sex, limiting the number of sexual partners, and getting regularly tested for STIs, especially if you’re part of a high-risk group, are key preventive measures to protect against syphilis.
Syphillis FAQs
Here are some frequently asked questions about syphilis, providing important information about the infection, its symptoms, and how to manage it:
- What is syphilis?
Syphilis is a sexually transmitted infection (STI) caused by the bacterium Treponema pallidum. It progresses through different stages and can lead to serious health problems if left untreated. - How is syphilis transmitted?
Syphilis is primarily transmitted through direct contact with syphilitic sores during vaginal, anal, or oral sex. These sores, called chancres, appear in the genital, anal, or oral regions. It can also be transmitted from an infected mother to her baby during pregnancy or childbirth. - What are the early symptoms of syphilis?
The early symptoms include painless sores (chancres) that appear at the site of infection, such as the genitals, anus, or mouth. These sores heal on their own within a few weeks but indicate the presence of the infection. - How is syphilis diagnosed?
Syphilis is diagnosed through blood tests that detect antibodies produced by the body in response to the infection. In some cases, a sample from a sore may be tested under a microscope. Testing is crucial for early detection and treatment. - Can syphilis be cured?
Yes, syphilis can be cured with antibiotics, typically penicillin. Early treatment is essential to prevent the disease from progressing to more severe stages. However, while treatment cures the infection, it does not reverse any damage already done by late-stage syphilis. - What happens if syphilis is left untreated?
If left untreated, syphilis can progress through several stages, leading to serious complications such as damage to the heart, brain, nerves, eyes, and bones. Untreated syphilis can be life-threatening in its later stages and may lead to neurosyphilis, cardiovascular syphilis, or even death. - Can I get syphilis more than once?
Yes, even if you have been treated and cured of syphilis, you can become infected again if you are exposed to the bacterium. Reinfection is possible, so practicing safe sex and regular testing is important. - Can syphilis affect pregnancy?
Yes, syphilis can be passed from a pregnant woman to her baby, leading to congenital syphilis. This can cause severe birth defects, stillbirth, or infant death. Pregnant women are routinely tested for syphilis to prevent transmission to the baby. - How can syphilis be prevented?
You can prevent syphilis by practicing safe sex, using condoms, and being in a mutually monogamous relationship with a partner who has tested negative for STIs. Regular testing is also important, especially if you have multiple sexual partners. - When should I get tested for syphilis?
You should get tested for syphilis if you have had unprotected sex, suspect that you may have been exposed to an STI, or notice any symptoms such as sores or rashes. Regular STI screenings are recommended for sexually active individuals, especially those with multiple partners.
Understanding syphilis and its risks is key to preventing and managing this infection. If you suspect you have been exposed or experience symptoms, seek medical advice promptly to prevent complications.