An Epstein pearl is a small, harmless cyst that appears inside a newborn’s mouth. These tiny white or yellow bumps show up along the gums or on the roof of the mouth, typically measure 1 to 3 millimeters across, and feel hard to the touch. They’re one of the most common findings in newborns, occurring in roughly 60% to 85% of all infants.
What Epstein Pearls Look Like
Epstein pearls appear as small, firm nodules that are white or yellowish in color. They’re most often found along the midline of the palate (the center ridge of the roof of the mouth) or along the gum line. You might see a single pearl or a small cluster of them. At 1 to 3 millimeters, they’re about the size of a pinhead, so they’re easy to miss unless you’re looking closely during a feeding or while your baby is crying with their mouth open.
Unlike a blister or sore, Epstein pearls are smooth, firm bumps that sit on the surface of the tissue. They don’t look inflamed, and the surrounding gum or palate tissue appears completely normal.
Why They Form
During fetal development, the tissues that form the roof of the mouth fuse together along the midline. As that fusion happens, small bits of skin tissue can get trapped beneath the surface. Those trapped cells produce keratin, the same protein that makes up your hair and fingernails, and it accumulates into a tiny cyst. That’s the pearl. It’s a normal byproduct of how the palate forms, not a sign that anything went wrong during development.
How Common They Are
Epstein pearls are extremely common. Studies estimate they appear in 60% to 85% of newborns, making them more of a normal variation than an abnormality. Prevalence varies somewhat by ethnicity: Japanese newborns are affected most frequently, with rates up to 92%, followed by white and African American infants. Because they’re so widespread, most pediatricians and delivery nurses recognize them immediately on a routine newborn exam.
Do They Cause Pain or Feeding Problems?
Epstein pearls don’t cause pain, discomfort, or any interference with feeding. Your baby won’t fuss because of them, and they don’t affect latching during breastfeeding or bottle feeding. They also don’t become infected or bleed. In practical terms, your baby doesn’t know they’re there.
You should avoid trying to pop, squeeze, or rub the pearls off. The tissue inside a newborn’s mouth is delicate, and manipulating the bumps can introduce bacteria and cause irritation that wouldn’t have happened otherwise.
When They Go Away
Epstein pearls resolve on their own, typically within the first few weeks to months of life. The normal friction from feeding gradually wears them down, and the trapped keratin is naturally reabsorbed. No treatment, medication, or procedure is needed. Most parents notice they’ve disappeared well before the baby’s first few months are over, often without a specific moment when they can tell the bumps are gone.
How to Tell Them Apart From Oral Thrush
The most common concern parents have when they spot white patches in a baby’s mouth is oral thrush, a yeast infection caused by Candida. The two look quite different once you know what to check for.
- Texture: Epstein pearls are firm, raised bumps. Thrush appears as soft, white patches that look more like cottage cheese or milk residue coating the tissue.
- Location: Epstein pearls sit along the gum ridge or the center of the palate. Thrush can appear anywhere inside the mouth, including the tongue, inner cheeks, and lips.
- Removability: Epstein pearls can’t be wiped off. Thrush patches can sometimes be scraped away, revealing red or raw tissue underneath.
- Baby’s behavior: Epstein pearls cause no fussiness. Thrush can make feeding uncomfortable, and babies with it may pull away from the breast or bottle.
If the white spots in your baby’s mouth are spreading, appear on the tongue or inner cheeks, or seem to bother your baby during feeding, those signs point toward thrush rather than Epstein pearls.
Similar Harmless Mouth Findings in Newborns
Epstein pearls aren’t the only benign bumps that can appear in a newborn’s mouth. Bohn’s nodules are similar small cysts, but they form along the outer edges of the gum ridge or on the palate away from the midline, rather than at the center. Dental lamina cysts appear directly on the crest of the gum ridge where teeth will eventually come in. All three types are harmless, painless, and disappear without treatment. Your pediatrician can tell the difference based on location alone.