What Is Syphilis?

Syphilis is a sexually transmitted infection caused by the bacterium Treponema pallidum. It develops through several stages and can affect the skin, nervous system, eyes, ears, heart, and other organs when left untreated.

Symptoms may disappear without treatment, but the infection can remain in the body. A person with no visible symptoms may still require treatment based on blood test results and exposure history.

Syphilis can be cured with appropriate antibiotics, although treatment may not reverse permanent damage caused by advanced infection.

How Is Syphilis Transmitted?

Syphilis may spread through direct contact with an infectious sore or lesion during:

• Vaginal sexual contact
• Anal sexual contact
• Oral sexual contact
• Direct genital skin contact
• Contact with oral or anal lesions
• Pregnancy and childbirth

Sores may be painless and located inside the mouth, vagina, rectum, or under the foreskin, making them easy to overlook.

Syphilis is not generally transmitted through toilet seats, swimming pools, shared utensils, clothing, or ordinary social contact.

Stages and Symptoms of Syphilis

Primary Syphilis

The first sign may be a firm, round, and usually painless sore called a chancre. It can appear at the site where the bacteria entered the body.

Possible locations include:

• Genitals
• Anus or rectum
• Mouth or lips
• Throat
• Nearby skin

The sore can heal without treatment, but the infection remains.

Secondary Syphilis

Secondary syphilis may cause:

• Rash on the palms or soles
• Widespread body rash
• Fever
• Swollen lymph nodes
• Sore throat
• Fatigue
• Patchy hair loss
• Headache or muscle aches
• Wart-like genital or anal lesions
• Mouth sores

Symptoms may be mild, disappear, and return.

Latent Syphilis

During the latent stage, there are no visible symptoms. Blood tests remain positive, and the infection may stay inactive for years.

Treatment depends partly on whether the likely duration of infection can be determined.

Tertiary Syphilis

Untreated infection can sometimes progress and damage the:

• Heart and blood vessels
• Brain and nervous system
• Eyes
• Bones
• Other internal organs

Advanced complications may appear years after the original infection.

Neurosyphilis, Ocular Syphilis and Otosyphilis

Syphilis can affect the nervous system, eyes, or ears during any stage.

Possible symptoms include:

• Severe headache
• Confusion or personality changes
• Weakness or numbness
• Difficulty walking
• Vision changes or eye pain
• Hearing loss
• Ringing in the ears
• Dizziness or balance problems

These symptoms require urgent specialist evaluation.

Who Should Consider Syphilis Testing?

Testing may be appropriate for people who:

• Have a new or multiple sexual partners
• Had sex without barrier protection
• Have a partner diagnosed with syphilis
• Notice a painless genital, oral, or anal sore
• Develop an unexplained rash
• Were diagnosed with another STI
• Are pregnant or planning pregnancy
• Live with HIV or use HIV prevention medication
• Had sexual exposure in a higher-risk network
• Want routine sexual health screening

Testing may be recommended even when no symptoms are present.

Syphilis Testing in Busan

Syphilis is generally diagnosed through a combination of blood tests.

Nontreponemal Tests

Tests such as RPR or VDRL may help:

• Screen for active infection
• Estimate disease activity
• Establish a baseline before treatment
• Monitor response after treatment

Results are commonly reported with a numerical titer.

Treponemal Tests

Treponemal antibody tests help confirm exposure to the syphilis bacterium. They may remain positive for many years or for life, even after successful treatment.

A positive treponemal test alone does not necessarily mean the infection is currently active.

Direct Testing of a Lesion

When a suspicious sore is present, direct testing from the lesion may be available in selected medical facilities.

Additional Testing

The doctor may also recommend:

• HIV testing
• Gonorrhea and chlamydia testing
• Hepatitis screening
• Pregnancy testing
• Neurological examination
• Eye or hearing assessment
• Cerebrospinal fluid testing when indicated

Can Syphilis Testing Be Negative After Exposure?

Yes. Blood tests may be negative during the early period after infection because antibodies have not yet reached detectable levels.

When recent exposure or a suspicious sore is present, the doctor may recommend:

• Repeat blood testing
• Direct lesion testing
• Preventive treatment after a confirmed exposure
• Temporary avoidance of sexual contact
• Partner evaluation

The appropriate timing depends on the exposure and initial results.

Syphilis Treatment Options

Penicillin Treatment

Penicillin is the standard treatment for syphilis. The dosage, number of injections, and treatment schedule depend on:

• Stage of infection
• Estimated duration
• Pregnancy status
• Neurological, eye, or ear involvement
• Previous treatment
• Immune status

Early syphilis may require a different regimen from late latent or advanced infection.

Treatment During Pregnancy

Penicillin is the recommended treatment for syphilis during pregnancy because it can treat the pregnant patient and help prevent congenital syphilis.

Pregnant patients with a reported penicillin allergy may require specialist-supervised desensitization before treatment.

Penicillin Allergy

Alternative antibiotics may be considered for selected nonpregnant patients without neurological, eye, or ear involvement. Close follow-up is important because evidence and effectiveness vary by regimen.

Patients should not select or obtain antibiotics without medical guidance.

Neurosyphilis and Ocular Syphilis Treatment

Syphilis affecting the brain, nerves, eyes, or ears typically requires a specialized intravenous penicillin regimen and hospital or specialist management.

Jarisch–Herxheimer Reaction

Some patients develop a temporary inflammatory reaction after treatment begins. Possible symptoms include:

• Fever
• Chills
• Headache
• Muscle aches
• Temporary worsening of the rash

This reaction usually begins within the first day and is not the same as a penicillin allergy. Pregnant patients should seek immediate advice because fever or uterine contractions may require monitoring.

Difficulty breathing, facial swelling, or widespread hives may indicate an allergic reaction and require emergency care.

Follow-Up After Syphilis Treatment

Follow-up blood tests are important to confirm an appropriate response. The doctor may monitor changes in the RPR or VDRL titer over time.

Follow-up frequency depends on:

• Infection stage
• Pregnancy
• HIV status
• Initial antibody titer
• Neurological symptoms
• Treatment used
• Risk of reinfection

Treponemal antibody tests may remain positive after successful treatment and are not generally used alone to confirm cure.

Partner Notification and Treatment

Sexual partners may require testing and, in some situations, treatment before their results become positive.

The clinic can provide guidance regarding:

• Which partners should be contacted
• Testing schedules
• Preventive treatment
• Additional STI screening
• When sexual activity can resume

Treating only one partner can lead to reinfection.

When Can Sexual Activity Resume?

Patients should avoid sexual contact until:

• Prescribed treatment is completed
• Infectious lesions have fully healed
• The doctor’s recommended waiting period has passed
• Relevant partners have been evaluated and treated

Condoms reduce risk but may not cover every infectious sore.

Syphilis During Pregnancy

Untreated syphilis can cross the placenta and lead to congenital syphilis.

Possible complications include:

• Miscarriage
• Stillbirth
• Premature delivery
• Low birth weight
• Newborn infection
• Neurological or organ damage

Syphilis testing should be completed early in pregnancy and repeated when clinically recommended. Prompt penicillin treatment is essential.

Possible Complications of Untreated Syphilis

Untreated infection may cause:

• Brain and spinal cord damage
• Vision loss
• Hearing loss
• Cardiovascular complications
• Cognitive or personality changes
• Weakness or impaired coordination
• Pregnancy complications
• Congenital infection
• Increased HIV transmission risk

Treatment can stop further progression but may not reverse established organ damage.

Syphilis and HIV

Syphilis sores can increase vulnerability to HIV acquisition and transmission. Patients diagnosed with syphilis are commonly offered HIV testing.

People living with HIV can generally receive the same stage-appropriate syphilis treatment but may require careful neurological assessment and follow-up.

Syphilis Care for International Patients

Busan offers confidential STI testing and treatment through sexual health, urology, gynecology, dermatology, and internal medicine clinics.

Patients should bring:

• Previous RPR, VDRL, or treponemal test results
• Documentation of earlier syphilis treatment
• A list of medications
• Information about penicillin allergies
• Partner test results when available
• Pregnancy information
• HIV-related medical records when relevant
• Dates of possible exposure

Documentation of the medication, dose, and treatment date is important for future medical care.

How Long Does Treatment Take?

Consultation and blood collection may be completed during one visit. Laboratory processing time varies by clinic.

The treatment schedule may involve one or several appointments depending on the infection stage. Follow-up blood testing continues over a longer period to confirm an appropriate decline in antibody titers.

Syphilis Treatment Cost in Busan

The total cost may depend on:

• Medical consultation
• RPR or VDRL testing
• Treponemal antibody testing
• Direct lesion testing
• Additional STI screening
• Penicillin injections
• Allergy evaluation
• Neurological, eye, or hearing assessment
• Hospital treatment
• Follow-up blood tests

Patients should request an individualized estimate after the stage and required treatment are determined.

When Should You Seek Urgent Medical Care?

Seek immediate medical evaluation for:

• Sudden vision loss or eye pain
• New hearing loss or severe dizziness
• Severe headache or neck stiffness
• Confusion or personality changes
• Weakness, numbness, or difficulty walking
• Symptoms during pregnancy
• Difficulty breathing after medication
• Facial swelling or widespread hives
• Rapidly worsening neurological symptoms

These signs may indicate neurological, ocular, auditory, pregnancy-related, or allergic complications.

Frequently Asked Questions

Can syphilis be cured?

Yes. Appropriate antibiotics can cure the infection. However, treatment may not reverse permanent damage caused by advanced disease.

Can syphilis return after treatment?

Treatment does not provide immunity. A person can become infected again through future exposure.

Does a positive syphilis test always mean active infection?

No. Some treponemal tests remain positive after successful treatment. Current activity is evaluated using test patterns, titers, history, and previous treatment records.

Can I have syphilis without symptoms?

Yes. Latent syphilis has no visible symptoms and is detected through blood testing.

Does my partner need treatment?

Partners may need testing and sometimes preventive treatment depending on exposure timing and the diagnosed stage.

Can international patients receive confidential care in Busan?

Yes. International patients can receive private syphilis blood testing, penicillin treatment, partner guidance, and follow-up monitoring in Busan.