A pinguecula is a small, raised, yellowish or white bump on the clear tissue covering the white of your eye. It’s not a tumor and it’s not cancerous. It’s a patch of tissue where the normal collagen and elastic fibers have broken down and reorganized into something abnormal, almost always caused by years of ultraviolet light exposure. Pingueculae are extremely common, showing up in nearly half of adults over 40.
What It Looks Like
A pinguecula appears as a small, slightly elevated spot on the conjunctiva, the thin transparent membrane that covers the white part of your eye. It’s typically yellowish or cream-colored, though some look almost white. Most form on the nasal side of the eye, the part closest to your nose, because that area gets the most UV exposure due to how light refracts through the cornea. They can also appear on the outer (temporal) side, and some people develop them on both sides of the same eye or in both eyes.
They’re usually just a few millimeters across. Many people notice one for the first time while looking closely in a mirror or when someone else points it out. In some cases, a pinguecula is so small and flat that it goes unnoticed for years.
What’s Happening Inside the Tissue
Under a microscope, a pinguecula looks quite different from normal conjunctival tissue. The collagen and elastic fibers beneath the surface have undergone what’s called elastotic degeneration. The elastic fibers aren’t simply aged or worn out. They’re biochemically abnormal, containing proteins that never normally appear together in the same fiber. The body’s control over how elastic fibers are assembled has gone wrong, resulting in a marked reduction of the tiny structural microfibrils that hold them together. The damaged tissue also accumulates dense calcium and protein deposits.
This process is driven primarily by ultraviolet radiation, which damages the structural proteins in the conjunctiva over time. Wind, dust, and dry air can accelerate the breakdown, which is why pingueculae are more common in people who spend significant time outdoors.
How Common They Are
A population study in Spain found that 47.9% of adults aged 40 and older had at least one pinguecula. The rate climbed with age and was notably higher in men (56.4%) than in women (42.7%), likely reflecting differences in cumulative outdoor exposure. In tropical and equatorial regions with more intense UV radiation, prevalence runs even higher. Pingueculae can develop in younger adults too, especially those with heavy sun exposure from outdoor work or sports.
Symptoms and When They Flare Up
Most pingueculae cause no symptoms at all. You might live with one for decades and never feel it. Problems tend to start when the bump becomes large enough to disrupt the smooth tear film across your eye, creating a dry spot. That can lead to a gritty, foreign-body sensation, as though there’s a grain of sand stuck under your eyelid.
Sometimes a pinguecula becomes actively inflamed, a condition called pingueculitis. During a flare, the area around the bump turns red and swollen, your eye may water excessively, and the irritation becomes harder to ignore. Flares are often triggered by the same environmental factors that caused the growth in the first place: wind, dust, dry air, or prolonged time in the sun without eye protection.
Pinguecula vs. Pterygium
People often confuse pingueculae with pterygia, and the two are related. The key difference is location. A pinguecula stays on the conjunctiva and never crosses onto the cornea, the clear dome over your iris and pupil. A pterygium, sometimes called surfer’s eye, is a wedge-shaped growth that extends from the conjunctiva onto the cornea itself. Because a pterygium can eventually grow over the pupil and interfere with vision, it’s treated more aggressively. A pinguecula can sometimes progress into a pterygium, though most never do.
Managing Symptoms
Since most pingueculae are painless, many people need no treatment at all. If yours causes dryness or a gritty feeling, over-the-counter lubricating eye drops (artificial tears) are the first step. They smooth the tear film over the raised area and reduce irritation. Preservative-free drops are gentler for frequent use.
When a pinguecula becomes inflamed, your eye doctor may prescribe a short course of anti-inflammatory drops to calm the redness and swelling. These flares typically resolve within a week or two with treatment. Surgical removal is rarely needed and is generally reserved for cases where the growth is large enough to be cosmetically bothersome or consistently uncomfortable despite drops. Recurrence after removal is possible, so surgery is not a casual decision.
Protecting Your Eyes
Because UV radiation is the primary driver, prevention comes down to shielding your eyes from the sun consistently, not just on bright beach days. Look for sunglasses labeled “UV400” or “100 percent UV protection,” which block both UVA and UVB rays. Wraparound styles offer extra coverage by limiting light that enters from the sides.
UV rays penetrate clouds and reflect off pavement, water, sand, and buildings, so wearing sunglasses on overcast days and even in the shade still matters. A wide-brimmed hat cuts the amount of UV reaching your eyes by roughly half on its own. If you already have a pinguecula, these same habits can help slow its growth and reduce the frequency of inflammatory flares. For anyone who drives frequently, keeping UV-protective sunglasses in the car is a simple habit that adds up over years of cumulative exposure.