Razor Bumps or STD? How to Tell the Difference
Quick answer
Razor bumps are irritation caused when shaving irritates the skin. They are usually itchy or tender, and they tend to improve once you stop shaving and let the hair grow. An STD sore can look similar: herpes often causes painful blisters or shallow sores, genital warts are growths, and a syphilis sore is often a single painless ulcer. You can't be sure by looking, so get checked if the bump is an open sore or doesn't improve.
Does this sound like razor bumps?
Tick the field marks that match.
The more of these match, the more likely it is razor bumps. This is not a diagnosis. A bump that opens into a sore, keeps growing, or persists after changing your shaving habits needs a clinician to look at it.
Bumps in the pubic area after shaving are a familiar problem, and it’s natural to wonder whether they could be something more. Most of the time they are irritation from hair removal. A few STD sores can look similar at first, though, so it helps to know the differences.
How do I tell if it’s razor bumps or an STD?
Look at three things: whether the bump follows shaving, whether it is a blister or sore, and how it changes once you stop shaving.
- Cause. Razor bumps come from shaving irritating the skin. An STD sore does not depend on shaving.
- Type of lesion. Herpes often causes painful blisters or shallow sores. Genital warts are growths. A syphilis sore is classically a single painless ulcer.
- Change over time. Razor bumps should improve once you stop shaving. Anything that opens into a sore, keeps growing, or persists after you change your shaving habits needs a closer look.
These are patterns, not rules. Some irritation looks unusual, and some STD sores look ordinary, so you can’t be sure by looking.
What causes razor bumps?
Razor bumps are caused when shaving irritates the skin. They are painful or itchy.
Shaving against the grain causes irritation. Shaving in the direction the hair grows, with a moisturizing shaving cream, helps reduce them.
Can herpes look like razor bumps?
It can. Herpes is often painful, but many herpes infections are mild or go unrecognized, so a single small spot can be mistaken for a razor bump. Herpes is more likely if the area burned or hurt before the spot appeared, if several blisters are grouped together, or if they break open into shallow, painful sores.
If you are unsure, a clinician can test a fresh sore. Swab tests are the most sensitive option for herpes when lesions are present.
Can genital warts look like razor bumps?
Genital warts are growths caused by certain types of HPV. They are usually flat, raised or stalked, and they are usually painless, though they can itch or hurt depending on size and location. Warts can increase in size or number over time.
A bump that is still there after you stop shaving, or one that is growing or multiplying, is worth showing to a clinician.
Could a bump be a syphilis sore?
The first sign of syphilis is typically a single sore that doesn’t hurt. Sometimes the sore is multiple or painful instead. Syphilis is a whole-body infection, and it is treated with antibiotics even if the sore goes away.
A painless sore that doesn’t heal, particularly after a possible exposure, is a reason to order a test online rather than wait.
How can I prevent razor bumps?
Gentle shaving habits make the biggest difference:
- Shave in the direction the hair grows, and shave when the hair is soft, for example after a shower or with a warm, damp washcloth.
- Use a cleanser before shaving and a moisturizing shaving cream while you shave.
- Replace a disposable razor after 5 to 7 shaves.
- Stop shaving for a while to let the hair grow, which removes the cause.
- After shaving, use a cool, damp washcloth on the skin.
What should I do while I wait?
- Stop shaving the area until it has settled.
- Keep the area clean, and wash your hands after touching it.
- Avoid shaving over any bump or sore.
- Take a photo each day so you can show a clinician how it has changed.
When should I get tested?
If the bumps are painful blisters or open sores, or they don’t improve after you stop shaving, a doctor or clinician can look at the area and swab a fresh sore if needed. If you had a possible exposure, order an STD test online. If it turns out to be razor bumps, you’ll have peace of mind. If it’s an STD, an early diagnosis helps.
Get care today if
- The bumps are spreading quickly, or the skin around them is hot, swollen and increasingly painful
- You have a fever or feel generally unwell along with the skin changes
- A painful lump is growing and filling with pus (a possible abscess)
- You can't pass urine, or the pain is severe
- Your immune system is weakened, for example by HIV, diabetes or chemotherapy, and the skin is getting worse
Call 911 for a medical emergency. Otherwise, urgent care or your doctor can see you today.
When to test
- Right away, if the bump is an open sore or blisterA clinician can test a fresh sore for herpes. Swab tests (NAAT) are the most sensitive option for herpes when sores are present. For syphilis, you can order a blood test online.
- If the bumps keep coming back or don't improve after you stop shavingSee a board-certified dermatologist, as the American Academy of Dermatology advises. Persistent bumps can leave lasting marks if left untreated.
- If there was a possible exposureOrder an STD test online. Syphilis blood tests can be negative very early on, so repeat them later. For a suspected recent herpes exposure, a blood test may need repeating about 12 weeks later.
Common questions
Can razor bumps look like herpes?
Yes, sometimes. Many herpes infections are mild or go unrecognized, so a small spot can be mistaken for a razor bump. Herpes is more likely if the area burned or was painful before the bump appeared, if several blisters are grouped together, or if they break into shallow, painful sores.
How long do razor bumps last?
They tend to settle once you stop shaving the area and let the hair grow, because that removes the cause. If a bump persists after you change your shaving habits, see a dermatologist.
Can shaving spread or cause an STD?
Razor bumps are caused by shaving irritating the skin, so they are not an STD. Avoid shaving over any open sore or blister.
Should I pop a razor bump?
No. Picking can irritate the area further. Razor bumps can leave deep grooves and raised scars when they are left untreated, so see a dermatologist if they do not clear.
Sources
This guide is general information written by a patient advocate using public health sources. It is not a diagnosis. Only a clinician who examines you, or a lab test, can tell you what you have. Read how we write and check our guides.