Table of ContentsView AllTable of ContentsSymptomsCausesDiagnosisTreatmentSide EffectsPreventionFrequently Asked Questions

Table of ContentsView All

View All

Table of Contents

Symptoms

Causes

Diagnosis

Treatment

Side Effects

Prevention

Frequently Asked Questions

This article discusses the symptoms, diagnosis, and treatment for oral syphilis.

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Healthcare provider examining a person’s throat

Syphilis Symptoms

Oral syphilis occurs when someone contracts the infection orally. When this happens, the initial symptom is one or multiple sores, known aschancres. As the disease progresses, it can go through other stages, including secondary, latency, and tertiary.

During secondary oral syphilis,lesionsthat appear as white patches can develop on the inner lips and tongue. These white patches could also develop into sores orulcers within the mouth.

The latency stage of syphilis presents with no symptoms at all, but if it progresses to the tertiary stage, lesions of dead skin cells can present on the roof of the mouth. While the bumps that develop in genital syphilis are typically painless, in more than 91% of oral cases, pain is present.

Secondary Syphilis SymptomsOther symptoms that can arise in a person with oral syphilis during the second stage include:FeverFatigueWeight lossHair lossSwollen lymph nodesMuscles aches and pains

Secondary Syphilis Symptoms

Other symptoms that can arise in a person with oral syphilis during the second stage include:FeverFatigueWeight lossHair lossSwollen lymph nodesMuscles aches and pains

Other symptoms that can arise in a person with oral syphilis during the second stage include:

The main cause of oral syphilis isoral sexual activitywith a person that has an active syphilis infection.

The syphilis bacteria, known asTreponema pallidum, enters the body through open cuts or sores, and when it does, it causes infection. If that bacteria enters through a cut within the mouth, oral syphilis will develop.

How Else Is Oral Syphilis Transmitted?While it is uncommon, oral syphilis can also develop in infants fed pre-chewed food from their loved ones with an active infection. Non-sexual and sexual biting has also been shown to cause syphilis transmission in some rare cases.Kissing when a person has an active infection or sore can also spread oral syphilis.

How Else Is Oral Syphilis Transmitted?

While it is uncommon, oral syphilis can also develop in infants fed pre-chewed food from their loved ones with an active infection. Non-sexual and sexual biting has also been shown to cause syphilis transmission in some rare cases.Kissing when a person has an active infection or sore can also spread oral syphilis.

The diagnostic process for oral syphilis is similar to that of other types of syphilis infection. However, dentists are usually the first to notice or examine the lesions.

In some cases, a dentist will perform abiopsyto determine if an infection is present, but other tests and a health history collection will be needed.

If syphilis is suspected after examination, a blood test known as a rapid plasma regain (RPR) will be performed to check for syphilis-specificantibodies, which are specialized proteins designed to help fight off syphilis infections.

If the test comes back positive, treatment may begin, or more tests may be ordered to help confirm the diagnosis. Other tests include blood tests that look for specific signs of the infection within the blood or a specialized lab test that looks for the syphilis bacteria.

Syphilis is curable with the use ofantibiotics. The length of time a person has had the infection and the stage of disease will play a role in how long their treatment will last:

Can Syphilis Come Back After Treatment?While the initial syphilis infection can be cured after treatment, a person is not protected from getting it a second time if they engage in sexual activity with someone who has an active infection.

Can Syphilis Come Back After Treatment?

While the initial syphilis infection can be cured after treatment, a person is not protected from getting it a second time if they engage in sexual activity with someone who has an active infection.

Possible Side Effects

Oral syphilis can lead to some of the same side effects as other types of syphilis if it is left untreated. During the later stages, especially the tertiary stage, untreated oral syphilis can affect the health of the brain, heart, and other organ systems. The side effects can include:

How to Prevent Syphilis in the Mouth

The best way to prevent oral syphilis is to avoid sexual contact with a person who has an active infection. Using protection while participating in oral sexual activities can also help prevent contracting a bacterial infection from another person.

If you are sexually active and have multiple partners, practicing safer sex and participating inregular screeningscan avoid any long-term complications that may arise if you do contract oral syphilis.

Risk Factors of Oral SyphilisIf you participate in oral sexual activity, you are at risk of contracting oral syphilis. However, some people may be more at risk than others, including:People who are HIV positivePeople who engage in oral sexual activity with partners that have syphilis or who engage in condomless oral sexual activityMen who have condomless oral sex with other men

Risk Factors of Oral Syphilis

If you participate in oral sexual activity, you are at risk of contracting oral syphilis. However, some people may be more at risk than others, including:People who are HIV positivePeople who engage in oral sexual activity with partners that have syphilis or who engage in condomless oral sexual activityMen who have condomless oral sex with other men

If you participate in oral sexual activity, you are at risk of contracting oral syphilis. However, some people may be more at risk than others, including:

What to Do When a Treated STD Comes Back

Summary

Oral syphilis is a type of syphilis that occurs within the mouth. When the bacterial infection is contracted in the mouth, the first sign of infection is typically one or more sores on the inside of the mouth. Secondary oral syphilis presents with worsened mouth lesions that can appear as white patches, sores, and ulcers. Other symptoms of syphilis can also be present, such as fever, headache, muscle aches and pains, and hair and weight loss.

While some people are at an increased risk of contracting oral syphilis, anyone that engages in condomless oral sex with a person who has an active infection can contract the infection. The best way to protect yourself against oral syphilis is to engage in safer-sex practices and get regular screenings.

A Word From Verywell

Oral syphilis can be challenging to diagnose, so be sure to visit your healthcare provider if you develop any mouth sore. Treatment is available for oral syphilis; the faster you get treatment, the better it will be for your overall health.

Frequently Asked QuestionsSyphilis is a common sexually transmitted infection. That said, oral syphilis is not as common. According to research, oral syphilis accounts for only 4%-12% of all syphilis cases.The speed at which oral syphilis can be diagnosed depends on several factors. The first is the incubation period, which is the time it takes for symptoms to appear. Since this number can range dramatically, it can be challenging to determine an actual timeline. Other factors include how quickly a person sees their healthcare provider for their symptoms and what tests are used. If testing is used first to rule out other conditions, the diagnosis will take longer.While it is rare, kissing someone who has an active oral syphilis infection can spread it. This typically only occurs if the infected person has sores in their mouth during the kiss and the other person has open cuts or areas of entry within their mouth for the bacteria to get in.While oral syphilis follows the same stage pattern as other types of syphilis and can go through a period of symptom-free latency, it does not resolve on its own. Therefore, all cases of syphilis, oral or otherwise, require treatment so that the infection does not progress to other areas of the body, compromising your overall health.

Syphilis is a common sexually transmitted infection. That said, oral syphilis is not as common. According to research, oral syphilis accounts for only 4%-12% of all syphilis cases.

The speed at which oral syphilis can be diagnosed depends on several factors. The first is the incubation period, which is the time it takes for symptoms to appear. Since this number can range dramatically, it can be challenging to determine an actual timeline. Other factors include how quickly a person sees their healthcare provider for their symptoms and what tests are used. If testing is used first to rule out other conditions, the diagnosis will take longer.

While it is rare, kissing someone who has an active oral syphilis infection can spread it. This typically only occurs if the infected person has sores in their mouth during the kiss and the other person has open cuts or areas of entry within their mouth for the bacteria to get in.

While oral syphilis follows the same stage pattern as other types of syphilis and can go through a period of symptom-free latency, it does not resolve on its own. Therefore, all cases of syphilis, oral or otherwise, require treatment so that the infection does not progress to other areas of the body, compromising your overall health.

10 Sources

Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

Thums MA, Koth VS, de Figueiredo M, Cherubini K, Salum FG.Oral manifestations of syphilis: An epidemiological study in southern Brazil.Aust Dent J.2021;66(3):289-294. doi:10.1111/adj.12834

Nyatsanza F, Tipple C.Syphilis: Presentations in general medicine.Clin Med.2016;16(2):184-188. doi:10.7861/clinmedicine.16-2-184

de Andrade RS, de Freitas EM, Rocha BA, Gusmão ES, Filho MR, Júnior HM.Oral findings in secondary syphilis.Med Oral Patol Oral Cir Bucal.2018;23(2):e138-e143. doi:10.4317/medoral.22196

Stoltey JE, Cohen SE.Syphilis transmission: A review of the current evidence.Sex Health.2015;12(2):103-109. doi:10.1071/SH14174

Czerninski R, Pikovski A, Meir K, Casap N, Moses AE, Maly A.Oral syphilis lesions–a diagnostic approach and histologic characteristics of secondary stage.Quintessence Int.2011;42(10):883-889.

MedlinePlus.Syphilis tests.

National Health Service.Syphilis.

Centers for Disease Control and Prevention.About syphilis.

Streight KL, Paranal RM, Musher DM.The oral manifestations of syphilitic disease: A case report.J Med Case Rep.2019;13(1):227. doi:10.1186/s13256-019-2171-z

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