What Can Be Mistaken for Herpes?
This page shows close-up medical photos of genital skin.
What can be mistaken for herpes? Pimples, ingrown hairs, yeast infections, syphilis sores, friction burns, jock itch and genital warts can all look like it. It goes the other way too: the CDC says mild herpes is often mistaken for a pimple or an ingrown hair.
When a patient asks me, "Is it herpes or something else?", I look for nine signs. They are below, in the same order as in my video.
No sign proves herpes by itself. Only a test of the sore can confirm it.
Prefer watching? Here are the nine signs on video:
Herpes or Something Else? The 9 Signs at a Glance
Herpes or something else? These nine signs separate a herpes outbreak from its look-alikes. One sign alone means little. Several together make herpes more likely.
Genital herpes is caused by the herpes simplex virus, HSV-1 or HSV-2 (CDC).
| Sign | What points to herpes | What look-alikes usually do |
|---|---|---|
| 1. Flu-like symptoms | Fever, body aches or swollen glands with a first outbreak | Stay on the skin, with no fever or body aches |
| 2. Tingling and nerve pain | Tingling, burning or shooting pain hours to days before the sores | Itch or sting at the spot only |
| 3. Thin, moist skin | Penis head, foreskin and shaft; vulva and vagina | Hairy skin (folliculitis), or the groin crease and inner thigh (jock itch) |
| 4. Pain | Painful sores | Mostly itch (yeast, jock itch), or no pain (syphilis sore) |
| 5. Clusters | Small blisters grouped on one red patch | Bumps that each sit around a hair, or one single sore |
| 6. Shallow sores | Shallow, on the surface of the skin | A firm sore with a hard edge (syphilis) |
| 7. One side | Repeat outbreaks usually stay on one side | A whole area is irritated (yeast, balanitis) |
| 8. Changes day by day | Red patch, then blisters, open sores, scabs and healed skin | Look the same for weeks (syphilis sore) or months (molluscum) |
| 9. Swollen glands | Tender, swollen glands in the groin | Syphilis can swell them too |
Sign 1: Flu-Like Symptoms Before the Sores (Herpes Prodrome)
A first herpes outbreak can make you feel sick, not just sore. The first thing you may notice is flu-like symptoms: fever, headache, muscle aches and swollen glands in the groin, according to the American Academy of Dermatology (AAD) and Mayo Clinic.
Doctors use the word prodrome for the warning symptoms that come before the sores. With a first outbreak, the herpes prodrome can include this flu-like feeling. With repeat outbreaks, the warning is usually local: tingling or pain at the spot (see Sign 2).
This sign belongs mostly to the first outbreak. The UK's guideline group for sexual health doctors, BASHH, says in its 2024 guideline that whole-body symptoms are much more common in a first infection than in repeat outbreaks. Many people never feel sick at all.
Why it helps: pimples, ingrown hairs, yeast infections and jock itch are skin problems. Fever and body aches are not among their usual symptoms (Mayo Clinic).
These symptoms are not specific to herpes, though. A cold or the flu causes them too.
Sign 2: Tingling and Shooting Nerve Pain
Herpes often gives a warning through the nerves. What does herpes tingling feel like? Symptoms often begin with tingling, itching or burning near where the sores will appear, says the World Health Organization (WHO).
Before a repeat outbreak, some people get genital pain, or tingling or shooting pain in the legs, hips or buttocks, a few hours or days ahead (Mayo Clinic).
The reason is where the virus lives. After the first infection, herpes stays dormant in the nerves that supply the skin, according to StatPearls, a medical reference hosted by the National Institutes of Health. When it wakes up, it travels down the nerve to the skin (DermNet, a reference written by skin doctors).
Not everyone gets this warning. A 2012 review in American Family Physician says warning symptoms may occur in about 20% of herpes cases. So no tingling does not rule herpes out.
In my experience, pimples, yeast infections and friction burns itch or sting where they are. They don't send shooting pain down a leg.
Herpes tingling with no outbreak
Tingling by itself is not enough to diagnose herpes. The usual pattern is a day or so of tingling, itching or burning, then a red patch and blisters in the same place.
The AAD says these warning signs can last up to 24 hours. The American Family Physician review says up to 48 hours.
Herpes nerve pain with no sores is harder to pin down. A swab test needs a visible blister or sore (NHS).
A blood test looks for antibodies, the body's markers of an infection (CDC). It cannot show what is causing the tingling today.
In my practice, tingling that lasts for days while the skin stays normal usually has another cause: an irritated nerve, tight pelvic floor muscles, or worry after a possible exposure.
One example is the pudendal nerve, which supplies the genital area. When it is irritated, it causes burning, tingling or stabbing pain that gets worse with sitting. Cycling and long hours of sitting are common causes (StatPearls).
Sign 3: Herpes Favors Thin, Moist Skin
Herpes shows up most on the thin, moist skin of the genitals. The virus prefers the skin and the body's moist linings, called mucous membranes (StatPearls). Small injuries to the skin help it get in (DermNet).
Herpes can also appear on thicker skin: the buttocks, hips and thighs (AAD). Look-alikes have their own favorite places. Folliculitis (inflamed hair follicles) forms around hairs, and jock itch starts in the crease of the groin (Mayo Clinic).
Herpes on the penis head, foreskin and shaft
In men, first-outbreak sores are most frequent on the head of the penis, the foreskin and the shaft (DermNet). Repeat outbreaks usually return to the head or the shaft. So herpes on the penis head, or herpes on the shaft, is a typical location, not an unusual one.
Other problems affect the same skin. Balanitis makes the head of the penis swollen, itchy and sore (NHS). For the full list, see rash on the penis.
Where herpes shows up in women
In women, sores appear on the vulva (the outer genitals), in the vagina and on the cervix (DermNet). A doctor needs an exam to see sores inside.
A yeast infection affects the same area, but it causes itching, redness, swelling and a thick white discharge (Mayo Clinic). See other causes of sores on the vulva.
Sign 4: Pain. Does Herpes Hurt?
Yes, usually. When herpes blisters break, they leave painful sores (AAD, CDC). Genital herpes does not typically cause painless sores (StatPearls). During a first outbreak, some people also have pain when they pee (AAD).
Pain helps most against syphilis. A syphilis sore is usually firm, round and painless, though not always (CDC). Because it doesn't hurt, people can miss it.
Can herpes be painless? It can be very mild. The CDC says most people with genital herpes have no symptoms or very mild ones. So a sore that doesn't hurt still needs a test.
Does herpes itch?
Yes, it can, mostly at the start. Mayo Clinic lists pain or itching around the genitals among the symptoms, and the AAD describes tingling or an itch before the sores.
So is herpes itchy? At first, yes. Then the blisters open and pain takes over.
If itching is the main symptom from start to finish, think of a yeast infection, balanitis or jock itch. Itching is a main symptom of all three (Mayo Clinic, NHS).
Sign 5: A Herpes Cluster of Blisters
Herpes blisters usually come in a group. The classic herpes cluster is several small blisters sitting close together on one red patch of skin (DermNet, AAD).
Does herpes always come in clusters? No. The CDC describes herpes as one or more blisters, so a single blister or sore can be herpes. If you have one bump, compare herpes vs. a pimple.
Look-alikes group differently. Folliculitis can also form clusters, but each bump sits around a hair and may fill with pus (Mayo Clinic).
A syphilis sore is usually single (American Family Physician, 2012). Genital warts are bumps or growths (AAD). Molluscum, a skin infection caused by a virus, forms firm bumps (CDC).
Sign 6: Shallow Sores, Not Deep Ones
Herpes sores are shallow. When the blisters break, they leave shallow sores on the surface of the skin (American Family Physician, 2012; DermNet).
I check this with a gentle pinch. Skin with herpes sores feels as soft as the skin next to it.
A syphilis sore is different. It is firm, with a hardened border (CDC; American Family Physician, 2012).
Sign 7: One Side of the Body
A repeat herpes outbreak usually stays on one side, left or right. The BASHH guideline says repeat outbreaks may switch sides from one time to the next, but each outbreak is usually one-sided. The sores stay in the patch of skin served by the infected nerve.
The first outbreak is the exception. In a first outbreak, the sores are usually on both sides (BASHH, 2024).
Compare that with problems that irritate a whole area. A yeast infection causes redness and swelling of the vulva (Mayo Clinic). Balanitis affects the head of the penis as a whole (NHS).
Sign 8: Herpes Changes Day by Day
Herpes does not look the same for long. A red, swollen patch comes first. Small blisters form on it, the blisters break into painful sores, and the sores scab and heal (AAD).
A first outbreak lasts about 2 to 3 weeks without treatment (DermNet), and the AAD says the sores usually heal within 2 to 6 weeks. Repeat outbreaks are shorter and usually heal in 7 to 10 days without scarring (DermNet).
Some look-alikes move more slowly. A syphilis sore usually lasts 3 to 6 weeks (CDC). Molluscum bumps typically last six months to a year (CDC).
To see each stage, go to herpes photos in different stages.
Sign 9: Swollen, Tender Glands in the Groin
Herpes can swell the lymph nodes (glands) in the groin, and they are tender to the touch (DermNet). In a first outbreak, they are usually swollen on both sides. In repeat outbreaks, about 30% of patients get swollen glands (BASHH, 2024).
This sign helps, but it is not specific. Syphilis can also cause swollen glands (CDC). With syphilis, they are only mildly tender (American Family Physician, 2012).
What Can Be Mistaken for Herpes: 9 Look-Alikes
Nine common problems can be mistaken for herpes: pimples and ingrown hairs (folliculitis), syphilis sores, yeast infections, balanitis, friction or razor burn, genital warts, molluscum, jock itch and contact dermatitis. Each row of the table shows what looks like herpes but is not, how it usually differs, and where to compare the two side by side.
| Look-alike | How it usually differs from herpes | Compare |
|---|---|---|
| Pimples, ingrown hairs and folliculitis | Bumps around hair follicles, sometimes with pus; itchy or tender (Mayo Clinic) | ingrown hair vs. herpes |
| Syphilis sore | Usually one firm, round, painless sore that lasts 3 to 6 weeks (CDC) | syphilis vs. herpes |
| Yeast infection | Itching, redness and swelling with thick white discharge; a severe case can crack the skin (Mayo Clinic) | yeast infection vs. herpes |
| Balanitis | The head of the penis is swollen, itchy and sore, sometimes with thick discharge under the foreskin (NHS) | balanitis vs. herpes |
| Friction burn or razor burn | Follows rubbing or shaving | friction burn or herpes |
| Genital warts (HPV) | Skin-colored bumps, some shaped like cauliflower; often no symptoms (AAD) | HPV vs. herpes |
| Molluscum | Firm bumps, sometimes with a dip in the center; they last six months to a year (CDC) | molluscum contagiosum pictures |
| Jock itch | An itchy, scaly, ring-shaped rash from the groin crease to the inner thigh (Mayo Clinic) | See below |
| Contact dermatitis (allergy or irritation) | An itchy rash where a soap, fragrance or rubber touched the skin; it can blister and ooze (Mayo Clinic) | — |
What can be mistaken for genital herpes less often? Chancroid, a reaction to a medicine, psoriasis and Behçet's disease can all cause genital sores (CDC; American Family Physician, 2016). For the rare infections, see chancroid vs. herpes.
You can also have two things at once. American Family Physician tells doctors to consider more than one cause for the same sores (2016).
Jock itch vs. herpes
Jock itch is a fungal skin infection. It causes an itchy, scaly rash that starts in the crease of the groin and spreads to the inner thigh and buttocks.
The rash is often ring-shaped, and its edge can have small blisters. That is why people confuse it with herpes (Mayo Clinic).
The differences: itching is the main symptom, the skin is scaly, and the center of the rash clears as it spreads outward (Mayo Clinic).
How to Know for Sure: Test the Sore
Given what can be mistaken for herpes, you can't know by looking. The CDC says a diagnosis based only on a history and an exam is often inaccurate. It says a suspected case of genital herpes should be confirmed with a lab test of the sore.
The test is a swab. A doctor swabs the sore, and the lab looks for the virus. The most sensitive method is a PCR test, which finds the virus's genetic material (CDC).
Go early. An older lab method, viral culture, gets much less accurate once a sore starts to heal (CDC). A negative swab does not fully rule herpes out, because the virus is not always present (CDC).
Ask about syphilis too. The CDC advises testing people with genital sores for syphilis and HIV as well as herpes. Even after full testing, more than 25% of people with genital sores get no lab-confirmed cause (CDC, 2021).
Have any new genital sore checked, even a painless one.
At STD Center NY, the doctor sees every patient. We swab genital and mouth sores, and the lab runs PCR or a culture. A standard STD panel does not include herpes, so ask for it.
If it is herpes, we can prescribe antiviral pills at the same visit. For repeat outbreaks, they work best when started within one day of the sores appearing, or during the warning tingle (CDC). For the swab and the blood test side by side, see how to test for herpes.
