Syphilis in women often starts as a single, painless sore that can be easy to miss, especially because it frequently appears inside the vagina or on the cervix where it’s not visible. The infection progresses through distinct stages over weeks and months, and each stage looks different on the skin and body. Here’s what to look for at every phase.
The First Sore: Primary Syphilis
The earliest sign of syphilis is a small, firm, round sore called a chancre. It typically shows up 10 to 90 days after exposure, though most people notice it within three to four weeks. The sore is usually painless, which is a major reason women often don’t realize they have it. It can range from a few millimeters to about the size of a dime, with clean, raised edges and a smooth or slightly indented center.
In women, chancres most commonly appear on the vulva, vaginal walls, or cervix. Because the cervix and inner vaginal walls aren’t areas you’d casually inspect, many women go through this entire stage without ever seeing the sore. Chancres can also develop on the anus, rectum, lips, tongue, or nipples, depending on where skin-to-skin contact occurred during sex.
The sore typically lasts one to five weeks and then heals on its own, even without treatment. This disappearance is misleading. The infection hasn’t gone away. It’s progressing to the next stage.
How a Chancre Differs From Herpes
Because any genital sore can cause alarm, it helps to know the key differences. A syphilis chancre is typically a single sore that’s firm to the touch and painless. Genital herpes, by contrast, usually produces clusters of small, fluid-filled blisters that sting or burn. Herpes blisters are fragile and break open into shallow, painful ulcers, while a chancre tends to stay intact with a clean, defined edge. That said, both infections can look atypical in some people, so a visual comparison alone isn’t reliable enough for diagnosis.
The Rash and Lesions of Secondary Syphilis
About six weeks after the initial sore first appears, the infection enters its second stage. This is when syphilis becomes much more visible, though the signs can still be surprisingly subtle.
The hallmark of secondary syphilis is a rash made up of round, reddish-brown spots or slightly raised bumps. It can appear on the trunk, back, arms, and legs, but the most distinctive feature is its involvement of the palms of the hands and soles of the feet. Most common rashes don’t show up in those locations, so spots on your palms or soles are a strong signal worth getting checked. Case reports describe these lesions as so faint that patients themselves hadn’t noticed them until a clinician specifically looked.
Condylomata Lata
During secondary syphilis, women may also develop condylomata lata: flat-topped, moist, grayish-white or reddish-brown plaques that tend to cluster in warm, moist areas. The vulva, perineum, and skin folds around the groin are the most common locations. These look quite different from genital warts (condylomata acuminata), which are rough, cauliflower-textured bumps. Condylomata lata are smoother, flatter, and have a moist surface. They can also appear in less expected spots like the spaces between toes, where they may be mistaken for a fungal infection.
Mucous Patches in the Mouth
Secondary syphilis can also produce sores inside the mouth. These appear as slightly raised, whitish patches surrounded by redness on the inner lips, tongue, or the arches at the back of the throat. When several patches merge together, they create a winding, trail-like pattern sometimes described as “snail-track ulcers.” Unlike chancres, oral mucous patches are often symptomatic and may cause discomfort. They’re typically multiple rather than solitary.
Along with these visible signs, secondary syphilis commonly causes fever, fatigue, swollen lymph nodes, patchy hair loss, and muscle aches. These flu-like symptoms combined with a rash on the palms or soles form the classic picture, but the symptoms eventually fade on their own, even without treatment, as the infection moves into a dormant phase.
The Latent Stage: No Visible Signs
After secondary symptoms resolve, syphilis enters a latent period where there are no visible signs at all. This stage can last years or even decades. You feel fine and look fine, but the bacteria remain in your body. Blood testing is the only way to detect the infection during this phase. Without treatment, roughly one-third of people with latent syphilis will eventually progress to the most damaging stage.
Late-Stage Syphilis on the Skin
Tertiary syphilis develops years after the original infection in people who were never treated. One of its skin manifestations is the gumma, a firm, nontender nodule or plaque that ranges from dusky red to brown. Gummas can form deep, punched-out ulcers at their center, often covered with crusts or dead tissue. They’re destructive lesions that can damage skin, bone, and internal organs. This stage is now rare in countries with accessible healthcare, but it still occurs.
Why Syphilis Is Harder to Spot in Women
The anatomy of female genitalia makes syphilis uniquely easy to miss. A chancre on the cervix or high on the vaginal wall produces no visible change that you’d notice during daily life. Even external vulvar chancres can be painless enough to go unnoticed if they’re small or in a fold of skin. Secondary-stage rashes may be faint, and condylomata lata in skin folds can be mistaken for irritation or a yeast infection.
This is compounded by the fact that syphilis is sometimes called “the great mimic” because its skin manifestations can resemble dozens of other conditions, from psoriasis to fungal infections to allergic reactions. In people with weakened immune systems, particularly those living with HIV, syphilis may present even more atypically. Multiple chancres can appear simultaneously, different stages of the disease can overlap, and more aggressive skin lesions may develop earlier than expected.
Testing Is the Only Way to Confirm
No visual inspection, whether by you or a clinician, is sufficient to diagnose syphilis on its own. Diagnosis requires blood tests that detect two types of antibodies produced in response to the infection. These two tests are used together because relying on just one can produce false results. Early in the infection, before the body has mounted a full immune response, blood tests can actually come back negative even when syphilis is present. In those cases, fluid from an active sore can be examined under a specialized microscope to identify the bacteria directly, though this needs to happen within 20 minutes of collecting the sample.
If you’ve noticed any painless sore in the genital area, a rash on your palms or soles, or moist flat lesions in skin folds, a simple blood draw can provide clarity. Syphilis at any stage is treatable, and earlier stages respond fastest.