Genital herpes symptoms: What to look for and when to seek advice

DoktorABC editorial team

Accurate, up-to-date health information written by our editorial team and reviewed by UK-registered prescribers.

Do all people with genital herpes get symptoms?

No. According to NHS and BASHH guidance, many people infected with herpes simplex virus (HSV) never develop noticeable symptoms, or have symptoms so mild they are attributed to something else, such as an insect bite, skin irritation, or ingrown hair. This means it is entirely possible to have genital herpes and be unaware of it.

When symptoms do occur, the first outbreak is usually the most pronounced. Subsequent outbreaks are typically milder and shorter.

What are the symptoms of a first genital herpes episode?

A first episode of genital herpes tends to be the most significant, because the immune system has not previously encountered the virus and has not yet developed antibodies to it. Symptoms typically include:

• Small fluid-filled blisters in the genital or anal area, which may appear on the vulva, vagina, cervix, penis, scrotum, buttocks, inner thighs, or around the anus
• Blisters that break open to form shallow, sometimes painful sores or ulcers before gradually healing
• Pain, itching, or burning in the affected area
• Pain when passing urine, particularly if urine comes into contact with open sores
• Flu-like symptoms, including fever, headache, muscle aches, and swollen lymph nodes in the groin; these systemic symptoms are more common in a first episode than in recurrences

Sores typically take two to four weeks to heal fully during a first episode, according to NHS guidance.

What does genital herpes look like?

Genital herpes typically begins as a tingling, itching, or burning sensation in the affected area before any visible changes appear. This is known as the prodromal phase. Visible symptoms then develop as small red spots or bumps, which quickly form fluid-filled blisters. These blisters are usually small, measuring a few millimetres, and may appear individually or in clusters.

The blisters burst after a day or two, leaving shallow sores or ulcers that may be red, slightly raised, and tender to touch. These sores then crust over and heal without scarring in most cases.

The overall appearance can be subtle, and sores in certain locations, such as inside the vagina or on the cervix, may not be visible without clinical examination. This is one of the reasons many people do not recognise genital herpes symptoms when they first occur.

How do symptoms differ in men and women?

The underlying process is the same in men and women, but the location of symptoms varies.

In women, blisters and sores most commonly appear on the vulva (the external genital area), the vaginal opening, the cervix, the inner thighs, buttocks, and around the anus. Symptoms inside the vagina or on the cervix are not visible without examination. Some women also experience vaginal discharge or pain during urination that they may not initially associate with herpes.

In men, blisters and sores typically appear on the penis (including the shaft and glans), the scrotum, inner thighs, buttocks, and around the anus. In men who are uncircumcised, sores may develop under the foreskin where they are less immediately visible.

In both men and women, symptoms can also occur in areas not directly involving the genitals, including the buttocks and thighs, which is why genital herpes is not always immediately recognisable.

What are the symptoms of a recurrent genital herpes episode?

After the first episode, the virus remains in the body in a dormant state in the nerve cells. It can reactivate at intervals, causing recurrent outbreaks. Recurrences are typically:

• Milder and shorter than the first episode, often lasting seven to ten days
• Often preceded by a prodrome: tingling, itching, or a burning sensation in the same area where the first outbreak occurred, before any blisters appear
• Less likely to include systemic symptoms such as fever or swollen glands

Some people experience frequent recurrences; others have very few or none after the first episode. Frequency tends to decrease over time for many people.

How soon after exposure do symptoms appear?

According to NHS and BASHH guidance, genital herpes symptoms typically appear within two to twelve days of exposure to the virus, if they appear at all. However, the incubation period can vary and in some cases symptoms may not develop for weeks, months, or years after initial infection, or may never develop at all.

This variability means that the appearance of symptoms cannot reliably pinpoint when or from whom the virus was transmitted. It is not always possible to identify the source of infection.

Can you diagnose genital herpes from symptoms alone?

No. While the symptoms described above can suggest genital herpes, they are not unique to it. Other conditions, including other sexually transmitted infections, skin conditions, and friction-related irritation, can produce similar-looking sores or blisters. A clinical diagnosis based on appearance alone is not always reliable, particularly in milder or atypical presentations.

Testing, ideally by swabbing an active sore for laboratory analysis, is the most reliable way to confirm a genital herpes diagnosis. If you think you may have symptoms, seeking a test promptly, while sores are still present, gives the most accurate result.