Syphilis Symptoms in Men & Women: Early Warning Signs | STI Health Check

Syphilis is a sexually transmitted disease (STD) caused by the bacterium Treponema pallidum. While it is easily treatable with antibiotics when detected early, its symptoms can be subtle, mimic other conditions, or go completely unnoticed.

Understanding the early warning signs helps you identify potential exposure quickly so you can take action before complications develop.

The Four Stages of Syphilis

Syphilis progresses through four distinct stages. While symptoms change or even disappear between stages, the infection remains active in the body and contagious until properly treated.

Stage	Typical Timeline	Key Signs & Characteristics
Primary	2–3 weeks post-exposure	A single, firm, painless sore (chancre) at the site of infection (genitals, mouth, or anus).
Secondary	Weeks to months post-exposure	Rough skin rash (often on palms or soles), fever, swollen lymph nodes, and fatigue.
Latent	Months to years post-exposure	No visible symptoms; the bacterial infection remains active internally.
Tertiary	Years later (if untreated)	Severe internal damage affecting the heart, brain, eyes, nervous system, and joints.

Early screening prevents syphilis from advancing into latent or tertiary stages where organ damage can become permanent.

Syphilis Symptoms in Men

In men, early physical signs often appear directly at the site of infection:

• A small, firm, painless sore on or around the penis, scrotum, anus, or mouth

• Non-itchy skin rash on the torso, palms of the hands, or soles of the feet

• Swollen lymph nodes, particularly in the groin

• Flu-like symptoms including fever, sore throat, or general fatigue

• Patchy hair loss or mild discomfort during urination

Note: Primary sores usually heal on their own within 3 to 6 weeks, but this does not mean the infection is cured.

Syphilis Symptoms in Women

In women, primary sores may occur internally within the vagina or cervix, making them difficult to spot without clinical examination. Common signs include:

• Sores around the vulva, vagina, anus, or mouth

• Unexplained, unusual vaginal discharge

• Non-itchy rashes on the body, palms, or soles

• Flu-like symptoms, fever, muscle aches, and swollen lymph nodes

• Patchy hair loss or persistent fatigue

Pregnancy Warning: Syphilis can be transmitted from a mother to a fetus during pregnancy (congenital syphilis), making early screening vital for maternal and reproductive health.

When to Test for Syphilis

The body produces antibodies in response to Treponema pallidum. These antibodies typically reach detectable levels 3 to 6 weeks after potential exposure.

• Ideal Initial Screening Window: 4 weeks post-exposure

• Follow-Up Retesting: 3 months post-exposure if you have new or multiple partners

What to Do If You Notice Symptoms

If you develop unexplained sores, rashes, or other warning signs:

1. Screen Privately at Home: Utilize an at-home blood-spot test kit from STI Health Check to receive preliminary screening results in 15 minutes.

2. Seek Clinical Confirmation: If your screening result is positive, contact a primary care physician or visit a local STD clinic for confirmatory blood testing and prescription penicillin treatment.

3. Abstain from Sexual Activity: Avoid sexual contact until you and your partner(s) complete treatment and receive clinical clearance.

Frequently Asked Questions

Q1. Can syphilis go away on its own?

No. While visible sores and rashes may fade naturally, the underlying bacterial infection remains active in the body until treated with antibiotics.

Q2. How long after exposure do syphilis symptoms appear?

Primary symptoms usually appear 2 to 3 weeks after exposure, though the incubation period can range from 10 to 90 days.

Q3. Can I screen for syphilis at home?

Yes. STI Health Check offers discreet at-home testing kits that allow you to collect a small finger-prick blood sample and read screening results in 15 minutes.

Q4. Are STI Health Check orders delivered privately?

Yes. All orders ship across the US in plain, unbranded packaging with no medical or product terms displayed on the exterior.

Q5. Is syphilis curable?

Yes. When detected early, syphilis is completely curable with appropriate prescription antibiotics, such as penicillin.