Genital herpes can look like small blisters, red or darker bumps, open sores or shallow ulcers around the genitals, anus, thighs or buttocks. The blisters may be filled with clear or cloudy fluid. They can burst and leave painful sores, which may sting when urine touches them.
On lighter skin, the area around the sores may look red or pink. On brown or black skin, the sores may look darker, purple, grey, brown or less red than expected.
Genital herpes symptoms can include:
At the beginning, herpes may not look like a blister straight away. You may first notice tingling, itching, burning, tenderness or soreness in one area. The skin may then become red, irritated, darker than usual or slightly swollen.
Within the next day or two, small bumps or blisters may appear. These can be easy to miss, especially if they are inside the vagina, under the foreskin, around the anus or hidden in pubic hair.
Early herpes can be mistaken for:
A herpes outbreak usually looks like a small cluster of fluid-filled blisters on sore or irritated skin. The blisters may appear around the genitals, anus, mouth or lips. They can burst and leave shallow, painful sores before drying, crusting or healing.
In some people, herpes does not look like obvious blisters. It may appear as small cuts, red or darker sore patches, ulcers, spots or a rash. The area may also tingle, burn, itch or feel painful before anything visible appears.
A herpes outbreak may look like:
Pictures can help you compare symptoms, but they cannot confirm herpes. A swab test from a fresh blister or sore is usually the best way to check.
Herpes blisters usually look like small, round, fluid-filled bumps. They may appear alone, but they more commonly appear in a group or cluster. The fluid inside the blister may look clear, whitish or cloudy.
Herpes blisters often:
A herpes blister is usually different from a pimple because a pimple is often centred around a hair follicle and may contain thicker white or yellow pus. Herpes blisters tend to be more delicate, painful and fluid-filled.
A herpes rash usually looks like a small cluster of fluid-filled blisters on a sore, irritated patch of skin. The blisters may look clear, white, yellowish or cloudy. They can appear around the genitals, anus, mouth or lips, and may burst into painful open sores before drying, crusting or scabbing over.
A herpes rash may start before blisters are visible. Many people notice tingling, itching, burning, soreness or sensitivity in one area first. The skin may then become red, pink, darker, purple, brown or slightly swollen depending on skin tone.
A herpes rash is more likely if:
However, a herpes rash can look similar to pimples, ingrown hairs, shaving rash, thrush, genital warts, syphilis or skin irritation. Pictures can help you compare symptoms, but they cannot confirm whether you have herpes. If you have a new rash, blister or sore around the genitals or mouth, speak to a sexual health clinic, pharmacist or doctor.
In men, genital herpes can appear as blisters, sores or ulcers on or around the:
Herpes on the penis may start as small red, brown, purple or skin-coloured bumps before becoming fluid-filled blisters. These blisters may then burst, leaving shallow painful sores. If herpes affects the urethra or the tip of the penis, passing urine may sting or burn.
Men may mistake herpes for an ingrown hair, shaving rash, friction burn, balanitis, thrush or syphilis. A swab test from a fresh blister or sore is the best way to confirm whether it is herpes.
In women, genital herpes can appear as blisters, sores, ulcers or small cuts around the:
Vaginal herpes can be harder to see because sores may be inside the vagina or on the cervix. Some women may notice pain, itching, burning, pain when passing urine or unusual discharge before they see any visible sores.
On the vulva or labia, herpes may look like small grouped blisters or shallow ulcers. The area may be swollen, sore or very sensitive. Sores in moist areas may not crust over in the same way as sores on dry skin.
Vaginal herpes may look like small blisters, ulcers, cracks or sore patches around the vaginal opening, labia or vulva. If sores are inside the vagina, you may not be able to see them. Instead, you may notice pain, burning, itching, pain during sex, pain when passing urine or unusual discharge.
Because vaginal herpes can look similar to thrush, BV, friction, dermatitis or other STIs, it is important to get checked if symptoms are new, painful, recurrent or linked to sexual contact.
Mouth herpes usually appears as cold sores. These are small fluid-filled blisters that commonly develop on or around the lips. They may also appear around the nose, cheeks, chin or inside the mouth.
A cold sore often starts with tingling, itching or burning. Over the next 48 hours, one or more painful blisters may appear. The blisters can burst, crust over and usually start to heal within around 10 days.
Herpes on the lips usually looks like a cold sore. It may begin as tingling, itching or burning on one area of the lip. A small painful spot may then appear, followed by one or more fluid-filled blisters.
Lip herpes may look like:
Cold sores are contagious from the first tingling sensation until the sore has completely healed. Avoid kissing, oral sex and sharing items that touch the mouth, such as lip balm, cups or cutlery, while you have symptoms.
Several conditions can look similar to herpes. This is why testing is important if you are unsure.
| Condition | How it can look | How it may differ from herpes |
| Pimple | Red or painful bump with pus | Often centred around a pore or hair follicle |
| Ingrown hair | Sore lump after shaving or waxing | Usually has a visible hair or occurs after hair removal |
| Folliculitis | Small inflamed spots around hairs | Often affects hair-bearing areas and may contain pus |
| Genital warts | Flesh-coloured or darker bumps | Usually firm, raised and cauliflower-like, not fluid-filled |
| Syphilis sore | Single round ulcer | Often painless and firm; needs urgent STI testing |
| Thrush | Redness, soreness, itching | Usually no grouped fluid-filled blisters |
| BV | Discharge and fishy odour | Usually no painful blisters or ulcers |
| Friction burn | Redness or soreness after sex/clothing friction | Usually no grouped fluid-filled blisters |
| Mouth ulcer | Round sore inside the mouth | Usually inside the mouth, not on the lip border |
Many ailments and conditions are similar in appearance to a herpes rash. While determining the difference between herpes, pimples, ingrown hairs, and other sexually transmitted infections (STIs) can be difficult, there are some subtle distinctions that can aid in detection.
As defined by the Centers for Disease Control and Prevention (CDC), Human papillomavirus (HPV) is among the most common STIs in the world. Certain strains of HPV cause genital warts. Similar to herpes, genital warts can appear as a small cluster of bumps. The warts may vary in size and appearance but are often flesh-coloured, raised and cauliflower-shaped.
Genital warts may form on the penis, scrotum, thighs, and lips. Females may develop warts on the walls of the vagina and cervix and inside the mouth or throat. Warts are typically painless, although sex may irritate them, resulting in an itching sensation or light bleeding.
Genital warts may emerge between six weeks and six months after contracting HPV, although some individuals may be asymptomatic.
Unlike herpes which cannot be cured, syphilis can be easily cured if treated in time. However, unlike herpes, syphilis can have devastating long-term effects if left untreated. The CDC details the four stages of syphilis, and how the small bumps the condition first presents are similar to herpes blisters. Unlike herpes, syphilis lesions are painless. Both conditions can affect the penis, vagina, anus, and mouth. Syphilis sores are usually round and firm, and last three to six weeks. Secondary stage infections may result in rashes that show up on the palms of the hands or bottom of the feet.
Folliculitis, a condition commonly distinguished by an infected ingrown hair, is often mistaken for herpes. As detailed by the Cleveland Clinic bacteria – frequently Staphylococcus Aureus – enters the hair follicle through a small pimple that has developed around it. Areas surrounding both the mouth and genitals may be irritated or affected by ingrown hairs as a result of shaving or grooming.
BV is an imbalance of the normal bacteria universe in the vagina. The CDC indicates that while BV is not considered a sexually transmitted infection (STI), it can increase a woman’s risk of contracting one.
Whilst there is no cure, genital herpes treatment can be used in two ways:
The two main antiviral treatment used for herpes are aciclovir tablets and valaciclovir tablets.
Outbreak treatment is used at the start of an outbreak during the prodrome phase. It can help to heal sores faster, and reduce pain associated with an outbreak.
Aciclovir dose: One 400mg tablet taken three times a day for five days
Valaciclovir dose: One 500mg tablet taken twice a day for five days
Aciclovir dose: One 400mg tablet to be taken twice daily long term
Valaciclovir dose: One 500mg tablet to be taken once daily long term
A single herpes bump may look like a small red, pink, brown or purple raised spot that becomes a fluid-filled blister. It may feel sore, tender, itchy or burning, and can burst into a shallow painful sore or ulcer. Herpes more commonly appears as a small cluster of blisters, but it can sometimes start as one visible bump. CDC describes herpes sores as blisters around the genitals, rectum or mouth that can break and leave painful sores.
A single herpes bump can be mistaken for a pimple, ingrown hair, shaving rash or friction spot. If it is painful, keeps returning in the same area, appears after sexual contact or turns into a blister or sore, a sexual health clinic can swab a fresh lesion to check for herpes.
Herpes does not usually smell. A strong or fishy genital smell is more likely to be linked to abnormal discharge, BV or another infection, so it is best to get tested if smell occurs with blisters, sores, pain or discharge.
NHS - Genital herpes | [Accessed 1st July 2026] https://www.nhs.uk/conditions/genital-herpes/
NHS - Cold sores | [Accessed 1st July 2026] https://www.nhs.uk/conditions/cold-sores/
WHO - Herpes simplex virus fact sheet | [Accessed 1st July 2026] https://www.who.int/news-room/fact-sheets/detail/herpes-simplex-virus
CDC - About genital herpes | [Accessed 1st July 2026] https://www.cdc.gov/herpes/about/index.html
British Association of Dermatologists - Herpes simplex | [Accessed 1st July 2026] https://www.bad.org.uk/pils/herpes-simplex
The Pharmaceutical Journal - Genital herpes: diagnosis and treatment | [Accessed 1st July 2026] https://pharmaceutical-journal.com/article/ld/genital-herpes-diagnosis-and-treatment
Whilst all of our content is written and reviewed by healthcare professionals, it is not intended to be substituted for or used as medical advice. If you have any questions or concerns about your health, please speak to your doctor.