Eye herpes typically shows up as small clusters of fluid-filled blisters on or around the eyelid, a red and watery eye, and, when the cornea is involved, a distinctive branching ulcer visible only with a doctor’s examination. The exact appearance depends on which part of the eye is affected and whether the cause is HSV (herpes simplex) or varicella zoster (the shingles virus). Both can range from mild redness that mimics pink eye to visible sores and noticeable cloudiness in the cornea.
Blisters and Rash Around the Eye
The most recognizable sign of eye herpes is what you can see in the mirror: small clusters of bumps or blisters filled with clear fluid, surrounded by red, irritated skin. These typically appear on the eyelid or the skin immediately around the eye. Over a few days, the blisters may break open, crust over, and heal, much like a cold sore on the lip. The eyelid itself often looks swollen and inflamed.
When varicella zoster (shingles) is the cause rather than HSV, the rash and blisters tend to appear on one side of the forehead and may extend down to the eyelid. A particularly telling sign is blistering on the tip or side of the nose. This is called Hutchinson’s sign, and it indicates that the nerve branch supplying the eye is involved, raising the risk of deeper eye complications. The American Academy of Ophthalmology notes that even without this nose involvement, up to 30% of people with shingles on the forehead still develop eye problems.
Redness and Discharge
Eye herpes frequently causes a red, bloodshot appearance along with watery or teary eyes. You may notice fluid oozing from the eye, and the white of the eye can look swollen or inflamed. These symptoms overlap heavily with common pink eye, which is why herpes in the eye is often misdiagnosed at first.
One visual clue that separates herpes from ordinary pink eye: herpes almost always affects only one eye. Standard viral conjunctivitis (the kind caused by adenovirus) is nearly always bilateral, showing up in both eyes. If you have significant redness, tearing, and irritation in just one eye, especially alongside any blistering on the eyelid, that pattern points more strongly toward herpes.
The Dendritic Ulcer on the Cornea
The hallmark sign of herpes on the cornea is something you won’t see on your own but that a doctor can spot clearly with a slit lamp and fluorescent dye: a branching, tree-shaped ulcer called a dendritic ulcer. This is one of the most distinctive patterns in eye medicine, and it’s essentially diagnostic of herpes simplex keratitis.
The infection starts as tiny dot-like spots on the surface of the cornea. These small lesions merge and grow into a star-shaped erosion, then into the classic branching pattern that follows the layout of the cornea’s nerve fibers. The branches have swollen, rounded ends that give them a bulb-tipped appearance. The ulcer is usually located near the center of the cornea, which is why it can blur vision even when it’s small. If you’re experiencing light sensitivity, a gritty or foreign-body sensation, and blurry vision alongside redness, a dendritic ulcer may be the reason.
Surface Versus Deeper Corneal Infection
Not all corneal herpes looks the same, and the depth of infection changes what you and your doctor will notice.
Epithelial keratitis is the surface-level form. This is where the dendritic ulcer lives. It affects only the outermost layer of the cornea. Vision may be mildly blurry, and the eye is red, watery, and light-sensitive, but the cornea itself still looks relatively clear to the naked eye.
Stromal keratitis goes deeper into the cornea’s middle layers. When this happens, the cornea develops visible haziness or cloudiness. In milder cases, the swelling is localized to one area. In more aggressive forms, you may see dense white patches (called infiltrates) in the cornea, along with widespread swelling. The cornea can look noticeably opaque or milky. This deeper infection is more serious because it can scar the cornea permanently and is the form most likely to threaten long-term vision.
What Chronic or Recurring Eye Herpes Looks Like
Eye herpes tends to come back. Studies estimate roughly a 25% chance of recurrence within the first year after an initial episode, climbing to about 33% within two years. Each flare-up can look similar to the first, with redness, tearing, light sensitivity, and potentially new ulcers on the cornea.
Over time, repeated episodes leave visible marks. The cornea may develop new blood vessels growing in from the edges, a process called neovascularization. Normally the cornea is completely transparent and has no blood vessels, so any visible red lines crossing into the clear part of the eye are abnormal. With treatment, these vessels can fade to faint “ghost vessels,” but without it, fatty deposits and scarring can build up and permanently cloud the cornea. In advanced cases, the cornea thins noticeably and, in rare situations, can perforate.
Stromal keratitis in particular follows a chronic pattern of low-grade inflammation with quiet periods interrupted by flare-ups. Each cycle of inflammation and healing adds more scarring, so the cornea may look progressively hazier over months or years.
How Treatment Affects What You See
Antiviral treatment for eye herpes typically involves medicated eye drops or gel applied multiple times per day, sometimes combined with oral antiviral pills, especially for shingles-related cases. For surface-level corneal herpes, the dendritic ulcer usually heals within one to two weeks with proper treatment, and redness and tearing resolve alongside it.
Deeper stromal infections take longer. Because the immune response itself drives much of the cloudiness and swelling, treatment often includes steroid eye drops alongside antivirals to calm inflammation. The corneal haze can take weeks to months to clear, and some degree of scarring may remain permanently if the episode was severe. For people with repeated scarring that significantly impairs vision, a corneal transplant is sometimes the only option to restore clarity.
The visual signs to watch for during or after treatment are a return of redness in one eye, increasing light sensitivity, blurry vision, or new blistering around the eyelid. These can signal a recurrence and benefit from prompt evaluation.