Open palms showing a faint rash

Syphilis Stages Timeline: What Happens and When

Syphilis moves through set stages: a painless sore, then a rash, then a quiet “latent” phase, and, if it is never treated, late complications years on. The first sign usually appears about 3 weeks after exposure, though anywhere from 9 to 90 days is possible. Because the early signs fade by themselves, plenty of people think it has gone when it hasn’t. Here is the timeline, what each stage looks like, how it differs from herpes, and what the tests mean.

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TL;DR

  • Typical incubation is 21 days, with a range of 9 to 90 days. The first stage is usually a single painless sore (a chancre).
  • Sores and rashes can vanish without treatment. That does not mean the infection has gone.
  • In the UK, syphilis is split into early (within 2 years of infection) and late (after 2 years).
  • A sore can’t be diagnosed by sight alone. Syphilis and herpes can look alike, so you need testing.
  • Early syphilis can be cured with the right antibiotics. Anyone with suspected syphilis should see a GUM or sexual health clinic.

Table of Contents

The syphilis timeline at a glance

Let’s be real: most people searching this are either worried about a recent encounter or trying to work out whether a strange mark or rash fits. So here is the whole picture first, then we’ll go stage by stage.

The figures below come from the BASHH 2024 syphilis guideline and NICE CKS guidance, the UK clinical references.

Stage Usual timing What you might notice
Incubation Typically 21 days after exposure (range 9 to 90 days) Nothing at all
Primary Starts at the end of incubation; the sore heals on its own over 3 to 8 weeks Usually one painless, firm sore (chancre) where the bacteria got in
Secondary Typically 3 to 10 weeks after the chancre appears; may clear by itself in 3 to 12 weeks A widespread rash, sometimes on palms and soles
Early latent Within 2 years of infection No symptoms
Late latent After 2 years No symptoms
Tertiary Late syphilis, more than 2 years after infection Serious complications affecting the brain, heart or other tissues

Note that the NICE grouping puts primary, secondary and early latent together as “early syphilis”, and late latent and tertiary together as “late syphilis”. Some websites describe three stages, some four. The labels differ, but the course of the infection is the same.

Incubation: the silent first weeks

After exposure there is a gap before anything shows. The BASHH guideline puts the typical incubation period at 21 days, with a range of 9 to 90 days.

That range matters for two reasons:

  • If you have nothing after two weeks, that isn’t an all-clear.
  • A sore could show up well over a month after the encounter you are thinking of, so it’s worth thinking back further than you’d expect.

Testing too early can also give a falsely reassuring result, because the body needs time to respond to the infection. We cover timing in the testing section below. Our guide on how soon after exposure to test for chlamydia explains the same “window” idea for another common infection.

Stage 1: primary syphilis

Primary syphilis is classically a single, painless, firm genital ulcer called a chancre, appearing where the bacteria entered. BASHH says it typically heals on its own over 3 to 8 weeks.

NICE lists other features that can occur, including a non-itchy rash, moist wart-like lesions, patchy sores in the mouth and swollen lymph nodes across the body.

Where chancres hide

The sore appears where the infection got in. That might be the genitals, but it can also be in the mouth or on or near the anus. Inside the vagina, rectum or mouth you might never see it, which is one reason people miss this stage.

Why “it healed” is not good news

Because the chancre is painless and fades by itself, it’s easy to shrug off. Healing of the sore isn’t the infection clearing. The bacteria carry on, and the next stage follows in a fair share of untreated cases.

Stage 2: secondary syphilis

BASHH reports that secondary syphilis develops in roughly 25% of untreated people, typically 3 to 10 weeks after the chancre appears. It often shows as a widespread rash that can affect the palms and soles.

The same guideline notes secondary symptoms may resolve spontaneously within 3 to 12 weeks, after which the infection enters the latent stage. NICE also lists swollen lymph nodes among the features of early disease.

A few practical points:

  • The rash doesn’t have to look dramatic. Rashes that don’t itch can be mistaken for something ordinary.
  • It can appear on the body generally, not only near where you were exposed.
  • If you’ve had a rash plus a recent sore, or a rash after a new partner, mention both when you talk to a clinician.

Stage 3: latent syphilis

Latent syphilis is a period with no symptoms at all. The BASHH guideline calls it early latent within 2 years of infection and late latent after that.

This stage is the reason syphilis gets called “the great imitator” and the reason testing matters: you can feel completely well while the infection is still there. It’s often picked up through a routine screen, not through symptoms.

Stage 4: tertiary syphilis

Untreated syphilis can progress to later stages. NICE says these can cause severe and sometimes irreversible complications, including neurosyphilis, cardiovascular syphilis and gummatous syphilis.

The good news from the same page: syphilis can be cured if it is treated early with appropriate antibiotics. That is the whole reason to act on the early stages, instead of waiting to see if things settle.

If you’re worried about late-stage disease, speak to a GUM clinic or your GP. Late syphilis involves specialist assessment, and that isn’t something to manage alone.

Syphilis sore vs herpes: why looking isn’t enough

This is the question behind “chancre vs herpes” and “syphilis vs herpes”. People search it because both can cause a genital sore, and it’s natural to want to work out which one you’ve got.

Here’s the honest answer: you can’t reliably tell by looking.

The textbook chancre is painless and firm. But BASHH says a chancre may also be multiple, painful, pus-filled, destructive and outside the genital area. That overlaps with what people expect from herpes, so a painless-versus-painful rule of thumb can mislead you.

Syphilis sore vs herpes: why looking isn't enough

When a clinician sees an ulcer, the BASHH guidance lists testing for herpes (HSV NAAT) and for syphilis (NAAT and/or dark-ground examination) alongside syphilis blood tests. In other words, both infections get checked, because one doesn’t rule out the other.

What to do if you have a sore

  1. Don’t pick at it or try to treat it yourself.
  2. Avoid sex until you’ve been assessed.
  3. Contact a sexual health clinic. St Helens Sexual Health is one example of a service that invites you to call for an appointment or walk in if you have symptoms. Most areas have something similar.

NHS clinics are free and confidential, and they can test for both infections and treat on the spot where needed.

How syphilis is tested: RPR, TPPA and what the letters mean

If you’ve been reading lab terms, here’s the plain version. Syphilis is usually diagnosed with blood tests that look for your body’s response, not the bacteria itself.

Treponemal tests

These detect antibodies against the syphilis bacterium. The BASHH guideline describes diagnostic testing as an EIA or CLIA screening test, followed by a different treponemal test to confirm.

You may see TPPA mentioned online as the confirmatory test. According to the UK Standards for Microbiology Investigations, TPPA was withdrawn in the UK in 2022. Confirmation may now be TPHA or TPLA, or a second EIA or CLIA.

RPR

RPR is a different kind of test. BASHH says a quantitative RPR should be done when screening tests are positive, and a four-fold rise in RPR titre compared with an earlier sample suggests recent infection. That is why clinics can use RPR to see how active an infection is and whether treatment is working.

RPR vs treponemal in one glance

Treponemal tests (EIA, CLIA, TPHA, TPLA) RPR
Used for Screening, then confirming Measuring activity (titre) and following change
Result Detects antibodies to the bacterium Gives a number that can rise or fall
In practice A positive screen is followed by a different treponemal test Done quantitatively after a positive screen

This comparison reflects how the UK guidance describes them. Your clinic will interpret the combination of results, your history and any symptoms together.

When to test after possible exposure

The incubation range of 9 to 90 days is the reason a single test straight after a risky encounter can fall short. St Helens Sexual Health advises waiting 12 weeks for syphilis testing. That lines up with the longest end of the incubation range.

A sensible approach:

  • If you have symptoms, don’t wait. Get seen.
  • If you don’t, plan a test around 12 weeks after the exposure you’re thinking about.
  • If you have a new partner or more than one, regular screening is a good habit, whether or not anything feels off.
  • If you’ve tested at home and had a positive or unclear result, follow it up with a GUM clinic for confirmation and treatment.

Why we care about this

We started Rapidtest because lots of people put off checking, not because they don’t care, but because the booking, the waiting room and the awkward chat feel like too much. Then a quiet, painless first stage comes and goes, and the infection carries on unnoticed.

That’s why we think an easy first step matters. Our at-home rapid kits are designed to give you a result in around 15 minutes, with full instructions, discreet packaging, free UK shipping and CE-certified kits. No queues, no waiting for a lab to post something back.

What a timeline like this one shows is that early is better: the earlier you know, the more options you have. We built Rapidtest so that checking in on your sexual health can be as ordinary as any other bit of life admin.

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Test at home, privately

If you’d rather start from your own bathroom than a waiting room, our STI range includes at-home rapid kits that cover several infections, including syphilis, with results in about 15 minutes. Prices start from £21.95, and we back every kit with a 60-day refund guarantee if it doesn’t work.

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You can browse the at-home STI and STD test kits to see what each kit screens for, or head to the Rapidtest home page for the full range. If a result is positive, or you have symptoms, a GUM or sexual health clinic is the next stop for confirmation and treatment.

Protecting yourself and your partners

A few habits make a real difference:

  • Screen regularly if your circumstances change: new partner, multiple partners or a partner who tells you they’ve tested positive.
  • Tell recent partners if you’re diagnosed. Clinics can help with this, including anonymously.
  • Pause sex while you have symptoms or are being treated, until a clinician says it’s fine.
  • Don’t self-treat. Antibiotics for syphilis have to be the right drug and course, which is why clinics prescribe them.

It’s also worth knowing that local health bodies are watching the trend. St Helens’ 2024 sexual health needs assessment describes syphilis as an important public health issue among men who have sex with men there, with incidence rising markedly over the past decade. Regular screening is a sensible habit in any community.

FAQ

How long does each syphilis stage last?

The chancre in primary syphilis typically heals over 3 to 8 weeks. Secondary symptoms can fade over 3 to 12 weeks. After that, the latent stage has no symptoms and is called early within 2 years and late after that, according to BASHH.

Can syphilis symptoms disappear without treatment?

Yes, and that’s the catch. Both the chancre and the secondary rash can clear on their own, but the infection moves into a symptom-free latent stage instead of going away. If you’ve had a sore or rash and it faded, you still need a test.

Is a syphilis sore the same as a herpes sore?

No, they are different infections, but they can look similar. A chancre is classically painless, though it can be painful, multiple or outside the genital area. Clinicians test for both rather than judging by appearance, so get any new sore checked.

Can late-stage syphilis be treated?

Syphilis can be cured when treated early with the right antibiotics. Untreated, it may lead to serious and sometimes irreversible problems, including effects on the nervous system and heart, according to NICE. Anyone with suspected syphilis should be referred to a GUM clinic or specialist sexual health service.

Sources

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