Several sexually transmitted infections can cause bumps on the buttocks, with herpes (HSV), genital warts (HPV), and molluscum contagiosum being the most common. Each produces a distinct type of bump, and knowing the differences can help you figure out what you’re dealing with and what to do next. That said, not every bump on the buttocks is an STD. Folliculitis and other skin conditions can look strikingly similar.
Herpes (HSV)
Genital herpes is one of the most common causes of painful bumps on the buttocks. The herpes simplex virus enters the body through tiny breaks in the skin or mucous membranes and can cause outbreaks on and around the genitals, rectum, buttocks, and inner thighs. The bumps typically start as small red spots that quickly develop into fluid-filled blisters. These blisters rupture within a few days, leaving behind shallow, painful ulcers that ooze or bleed before scabbing over. The whole process from first tingle to healed skin usually takes two to three weeks for a first outbreak, and shorter for recurrences.
A hallmark clue is the prodrome: many people feel burning, itching, or tingling in the area before any visible bumps appear. First outbreaks are often accompanied by flu-like symptoms such as body aches, fever, and swollen lymph nodes. Recurrent outbreaks tend to be milder and shorter. Herpes can also spread even when no sores are visible, which is why condoms reduce but don’t eliminate the risk of transmission.
If you have an active sore, a provider can swab it for a definitive diagnosis. When no sore is present, a blood test can show whether you’ve been exposed to the virus. For managing outbreaks, antiviral medications can shorten healing time and reduce how often outbreaks happen. Daily suppressive therapy cuts recurrence frequency by 70% to 80% in people with frequent outbreaks. Starting antiviral treatment within the first day of an outbreak is most effective.
For comfort during an active outbreak, cool compresses applied several times a day can ease pain and itching. Wash sores gently with soap and water, then pat dry. Let them air out rather than covering them with bandages or applying ointments unless specifically prescribed. Loose-fitting cotton underwear helps reduce friction and irritation. Over-the-counter pain relievers like ibuprofen or acetaminophen can take the edge off.
Genital Warts (HPV)
Genital warts are caused by certain strains of the human papillomavirus. They appear as flesh-colored bumps that can be flat and smooth or raised with a rough, cauliflower-like texture. They may show up as a single bump or a cluster. Unlike herpes sores, warts are usually painless, though they can occasionally itch. They commonly appear around the genitals, anus, and buttocks.
One tricky aspect of HPV is the timeline. The virus can remain dormant for months or even years before warts appear. About 90% of HPV infections are cleared by the immune system within two years, but some persist and produce warts long after the initial exposure. This makes it difficult to pinpoint exactly when or from whom you contracted the virus.
A healthcare provider can usually diagnose genital warts by visual examination alone. Treatment focuses on removing the warts themselves, since there’s no antiviral that clears HPV from the body. Common removal methods include cryotherapy (freezing the wart with liquid nitrogen), electrocautery, and laser removal. A prescription cream that stimulates the immune system to attack the wart is another widely used option. Cryotherapy tends to have the highest clearance rates, especially for multiple warts. Treatment often takes at least three months, and warts can recur even after successful removal because the underlying virus may still be present.
Molluscum Contagiosum
Molluscum contagiosum produces small, firm, raised bumps that are often pearly or skin-colored. Their signature feature is a tiny dimple or pit in the center of each bump, which distinguishes them from both warts and herpes blisters. The bumps are painless and can appear anywhere on the body, but when spread through sexual contact, they tend to cluster around the genitals, lower abdomen, inner thighs, and buttocks.
Molluscum is caused by a poxvirus and spreads through direct skin-to-skin contact or shared items like towels. In adults, it’s often (though not always) sexually transmitted. The bumps usually resolve on their own as the immune system clears the virus, but this can take anywhere from several months to over a year. If you want them gone sooner, a provider can freeze, scrape, or treat them topically.
Syphilis
Syphilis is a less common but important cause of skin lesions on the buttocks. In its secondary stage, syphilis produces a widespread rash of circular, slightly raised, scaly spots that can cover the entire body, including the palms, soles, and buttocks. In the perineal and buttock area specifically, these lesions can merge into larger, moist, flat growths called condylomata lata, which are highly infectious. Secondary syphilis rashes are distinctive because they’re typically widespread rather than limited to one spot, and they may be accompanied by other symptoms like hair loss, sore throat, and fatigue.
Syphilis is diagnosed with a blood test and treated with antibiotics. Because it progresses through stages and can cause serious complications if untreated, getting tested promptly matters.
How to Tell It’s Not an STD
Folliculitis is probably the most common non-STD cause of bumps on the buttocks, and it’s easy to confuse with herpes at first glance. Folliculitis happens when hair follicles become inflamed, usually from friction, shaving, or a bacterial infection. The bumps look like small pimples or red dots centered around hair follicles. They may be tender or itchy but don’t form the grouped, fluid-filled blisters typical of herpes, and they don’t have the central dimple of molluscum or the cauliflower texture of warts.
Other look-alikes include ingrown hairs, contact dermatitis from irritating fabrics or products, and simple acne. These tend to respond to basic hygiene measures, warm compresses, and loose clothing. If bumps are recurring, spreading, or accompanied by other symptoms like pain, fever, or discharge, that’s a stronger signal to get tested.
Getting Tested
If you have an active bump, blister, or sore, the most direct test is a swab. A provider collects fluid or cells from the lesion and sends it for analysis. This can identify herpes, syphilis, or HPV depending on the type of test ordered. For herpes specifically, a swab from an active sore is more reliable than a blood test for confirming a current outbreak, though blood tests are useful for detecting past exposure when no sore is present.
Visual diagnosis alone isn’t always reliable, especially early on when different conditions can look similar. If you’re unsure what’s causing bumps on your buttocks, getting swabbed while the lesion is still fresh gives the clearest answer. Many clinics can also test for multiple STDs at once, so it’s worth asking for a broader panel if you have any concern about recent exposure.
Why the Buttocks Specifically
Viral STDs like herpes and HPV spread through skin-to-skin contact, not just through intercourse. The buttocks are in direct contact with surrounding genital and anal skin during many forms of sexual activity, which means the virus can easily reach that area. Condoms protect the skin they cover but leave the buttocks, inner thighs, and surrounding skin exposed. Herpes in particular tends to affect a broad zone around the genitals because the virus travels along nerve pathways. Once it establishes itself in a nerve cluster near the base of the spine, outbreaks can surface anywhere in that nerve’s territory, including the buttocks, even if the original infection was elsewhere.