Herpes sores most commonly appear on the lips and around the mouth (caused by HSV-1) or on and around the genitals (caused by HSV-2), but the virus can show up on many other parts of the body depending on where it enters the skin. The location of an outbreak is determined by which nerve cluster the virus settles into after the initial infection, which is why sores tend to recur in the same general area each time.
Oral Herpes: Lips, Mouth, and Face
HSV-1 is the type most associated with oral outbreaks. During a first infection, sores can appear on and around the lips and throughout the inside of the mouth, including the gums, tongue, and roof of the mouth. Painful, fluid-filled blisters may also form under the nose.
Recurring outbreaks tend to be milder and more predictable. They usually show up along the edges of the lips, which is why they’re commonly called cold sores or fever blisters. The virus hides in a nerve cluster near the temple called the trigeminal ganglion, which supplies sensation to the face. That’s why oral herpes outbreaks stay confined to the face and mouth rather than popping up elsewhere on the body.
Genital Herpes: Below the Waist
Genital herpes, most often caused by HSV-2, produces sores on and around the genitals and anus. In women, blisters can develop on the vulva, vagina, and cervix. In men, they appear on the penis and scrotum. Both sexes can get sores on the buttocks, inner thighs, rectum, and urethra.
Sores develop wherever the virus first entered the body, so the exact location varies from person to person. After the initial infection, HSV-2 retreats to nerve clusters in the lower spine (the lumbar-sacral ganglia). This is why genital outbreaks stay in the lower body. Before a recurrence, many people feel warning signs called prodromal symptoms: tingling, itching, or shooting pain in the genitals, legs, hips, or buttocks. These sensations typically begin a few hours to a few days before blisters appear.
HSV-1 Below the Waist Is Increasingly Common
The old rule that HSV-1 stays on the face and HSV-2 stays below the waist no longer holds. HSV-1 has become the leading cause of first-episode genital herpes in many high-income countries, especially among adolescents and young adults. The shift is largely driven by oral-to-genital transmission. In North America and Western Europe, genital HSV-1 infections are rising by 1 to 2 percent annually.
The location of a genital HSV-1 outbreak looks identical to one caused by HSV-2, but there’s a significant difference in how often it comes back. Genital HSV-2 recurs roughly 0.33 times per month (about four times a year on average), while genital HSV-1 recurs only about 0.02 times per month, roughly once every four years. So while a first outbreak of genital HSV-1 can be just as painful, long-term recurrences are far less frequent.
Fingers, Hands, and Skin Contact Areas
Herpes can infect the fingers in a condition called herpetic whitlow. It causes painful blisters on the skin around the fingernail, usually on just one finger, though it can spread to others. This happens when the virus enters through a break in the skin, often from touching an active sore. Healthcare workers and people who bite their nails or suck their thumbs during an oral outbreak are most at risk.
Athletes in close-contact sports like wrestling and rugby can develop outbreaks on the head, neck, and trunk, a pattern sometimes called herpes gladiatorum or “mat herpes.” The blisters look like clusters of clear, fluid-filled bumps that may be surrounded by redness. They typically heal within seven to ten days. Any area of skin exposed to direct contact with an active sore is a potential site.
Eyes
Herpes can infect the eye, most often the cornea. It typically starts as small dot-like spots on the surface of the cornea that merge into larger, branching ulcers. These ulcers can progress into wider areas of damaged tissue if left untreated. The infection can also spread deeper, affecting the iris and other internal structures of the eye. Ocular herpes is almost always caused by HSV-1 reactivating from the trigeminal ganglion, the same nerve cluster responsible for cold sores. Redness, pain, light sensitivity, and blurred vision are common signs.
Why Outbreaks Keep Returning to the Same Spot
After the first infection, herpes doesn’t leave the body. It travels along nerve fibers to a specific nerve cluster and goes dormant there. HSV-1 strongly prefers the trigeminal ganglion (which serves the face), while HSV-2 strongly prefers the lumbar-sacral ganglia (which serve the lower body). Research in the Journal of Virology showed that the two virus types actually settle into different types of nerve cells within these clusters, which helps explain why each type reactivates more efficiently from its preferred location.
When the virus reactivates, it travels back down the same nerve pathways to the skin surface, producing sores in roughly the same area as the original outbreak. This is why someone with oral herpes will keep getting cold sores on their lips, and someone with genital herpes will keep getting sores in the genital region. The pattern is remarkably consistent: oral HSV-1 recurs about 0.12 times per month, while oral HSV-2 barely recurs at all (0.001 times per month). The virus simply reactivates more readily from the nerve cluster it’s best adapted to.
What the Sores Look Like at Each Stage
Regardless of location, herpes sores follow the same general progression. They begin as small, red, sensitive patches of skin. Within a day or two, clusters of fluid-filled blisters form. These blisters break open, leaving shallow, painful ulcers that may weep or bleed. A crust or scab develops over the ulcers, and healing follows. The whole cycle from first tingle to healed skin usually takes seven to fourteen days for recurrent outbreaks, though a first episode can last longer.
Visual diagnosis alone is unreliable. The CDC notes that the classic blistering pattern is absent in many people at the time they’re evaluated, and clinical diagnosis should be confirmed with a type-specific lab test. Nucleic acid testing from an active sore is the most sensitive method available. Blood tests can detect HSV-2 antibodies, but HSV-1 blood tests can’t distinguish between oral and genital infection, which limits their usefulness for pinpointing where the virus lives in a given person.