Bohn’s nodules and Epstein pearls are both tiny, harmless cysts that appear inside a newborn’s mouth, and the difference between them comes down to where they sit and which tissue they grew from. Both look like small white or yellowish bumps on the gums or palate, and both disappear on their own within weeks to months. The distinction matters mostly to clinicians sorting out what they’re seeing during an oral exam, but for parents, the practical takeaway is the same: neither requires treatment.
Where Each One Shows Up
Location is the most reliable way to tell these cysts apart, and it’s the basis of the original classification that dates back to the 1800s. Epstein pearls sit along the midpalatal raphe, the seam running down the center of the roof of the mouth where the two halves of the palate fused during fetal development. Bohn’s nodules, by contrast, tend to cluster near the junction of the hard and soft palate or along the alveolar ridges, the bony ridges where teeth will eventually emerge.1International Journal of Research and Reports in Dentistry. Bohn’s Nodules and Epstein Pearls in a Neonate: A Case Report – Section: 1. INTRODUCTION There is also a third category, dental lamina cysts, which appear on the crests of the alveolar ridges and derive from a different structure altogether. All three are grouped under the umbrella term “oral inclusion cysts of the newborn,” but each has its own developmental story.
In practice, clinicians sometimes find these cysts in overlapping zones, which makes a clean diagnosis by location alone imperfect. A cyst sitting right at the border of the hard palate and the alveolar ridge could be called either a Bohn’s nodule or a dental lamina cyst depending on who’s examining it. This classification ambiguity is well known in the pediatric dental literature and explains why prevalence figures for each type vary so much between studies.
Different Tissues, Different Origins
Beyond geography, the cysts differ in what they’re made of. Epstein pearls are keratin-filled cysts that form from small bits of epithelial tissue trapped during palatal fusion. When the two palatal shelves grow toward each other and merge in utero, fragments of surface tissue can get sealed inside the junction. Those fragments sometimes form tiny pockets that fill with keratin, the same protein that makes up the outer layer of your skin. Alois Epstein first described this in 1880.2International Journal of Research and Reports in Dentistry. Bohn’s Nodules and Epstein Pearls in a Neonate: A Case Report – Section: 1. INTRODUCTION
Bohn’s nodules, described even earlier by Heinrich Bohn in 1866, are thought to come from remnants of minor salivary gland tissue rather than from palatal fusion. The distinction is meaningful because it explains why the two cyst types tend to show up in different places: Epstein pearls follow the midline where the palate fused, while Bohn’s nodules scatter along areas rich in developing salivary glands. That said, under a microscope, both types are lined with epithelial cells and contain keratin. Without knowing exactly where the cyst was sitting, a pathologist looking at a tissue sample might not be able to tell one from the other.
Dental lamina cysts, the third type, originate from the dental lamina, the band of tissue that gives rise to tooth buds. These cysts reflect leftover fragments from the very early stages of tooth development and appear where teeth will eventually erupt.
How Common Are They
Oral inclusion cysts are among the most frequently observed findings in newborn oral exams. One study of newborns in Quito, Ecuador found that about 72% had at least one oral anomaly, with Epstein pearls being the single most common finding at 50%.3PubMed Central. The Prevalence of Oral Anomalies Among Healthy Newborns at a Gynecological Obstetric Hospital in Quito, Ecuador: An Observational, Cross-Sectional Study – Section: Results Another study of newborns in Meerut, India reported Epstein pearls in about 38% of the babies examined.4PubMed Central. Assessment of Intraoral Findings of Neonates, Born in and around Meerut City – Section: Abstract A study of twin babies found Epstein pearls in 88% of the sample.5Pediatric Dermatology. Physiological skin manifestations in twins: association with maternal and neonatal factors
The wide range across studies reflects differences in study populations, examination techniques, and how carefully the oral cavity was inspected. Broader estimates suggest that palatal cysts (which includes Epstein pearls) occur in roughly 65% of newborns, while alveolar cysts (Bohn’s nodules and dental lamina cysts) are seen in about a quarter to half of newborns.6International Journal of Research and Reports in Dentistry. Bohn’s Nodules and Epstein Pearls in a Neonate: A Case Report – Section: 1. INTRODUCTION Many babies have more than one type at the same time. A baby with a row of Epstein pearls along the palate might also have Bohn’s nodules on the gum ridges, and this coexistence is completely normal.
Preterm Babies and Maternal Factors
Whether a baby is born at term or preterm appears to influence which cysts show up. Research comparing preterm and full-term newborns found that Bohn’s nodules and dental lamina cysts were significantly more common in full-term babies, while the frequency of Epstein pearls was similar regardless of gestational age.7PubMed. Identification of oral cavity abnormalities in pre-term and full-term newborns: a cross-sectional and comparative study – Section: RESULTS This makes biological sense: Bohn’s nodules derive from salivary gland tissue that continues developing in the later weeks of gestation, so a baby born early may simply not have had enough time for those remnants to form cysts. Epstein pearls, on the other hand, arise from palatal fusion, a process that happens relatively early in fetal development, so premature birth doesn’t short-circuit them the same way.
One large study also found that maternal folic acid supplementation during pregnancy was associated with a higher likelihood of all three types of oral cysts. Babies whose mothers took folic acid had roughly 1.8 times the odds of presenting with Bohn’s nodules and about 1.6 times the odds of Epstein pearls compared to babies whose mothers did not supplement.8PubMed Central. Oral findings and its association with prenatal and perinatal factors in newborns – Section: Results That finding sounds alarming if you take it at face value, but it deserves context. Folic acid promotes normal cell growth and tissue development. Women who take folic acid also tend to have better prenatal care overall and are more likely to carry to full term, which itself is associated with higher cyst prevalence. The cysts are harmless regardless, so even if folic acid genuinely does increase their frequency, that’s not a reason to avoid supplementation. The same study found that preterm birth was negatively associated with Bohn’s nodules, reinforcing the gestational age connection.9PubMed Central. Oral findings and its association with prenatal and perinatal factors in newborns – Section: Results
Studies have not found consistent links between these cysts and the baby’s sex, birth weight, or maternal age.10PubMed Central. The Prevalence of Oral Anomalies Among Healthy Newborns at a Gynecological Obstetric Hospital in Quito, Ecuador: An Observational, Cross-Sectional Study – Section: Results They appear to be a normal part of oral development rather than a signal of anything unusual about the pregnancy or the child.
What Happens to Them
In the vast majority of cases, both Bohn’s nodules and Epstein pearls resolve on their own within the first few weeks to months of life. The cyst wall gradually merges with the overlying oral tissue, and the keratin contents either get discharged into the mouth or slowly reabsorb.11International Journal of Research and Reports in Dentistry. Bohn’s Nodules and Epstein Pearls in a Neonate: A Case Report – Section: 3.2 Treatment and Outcomes The baby doesn’t notice this happening. There’s no pain, no bleeding, and no wound left behind. One day the bumps are there; weeks later, they’re gone.
No treatment is necessary. Some authors have mentioned gentle digital massage over the nodules to help them resolve, but others consider even that pointless or potentially irritating to the tissue.12Acta Medica Philippina. Bohn’s Nodule: A Rare Case in a 7-month-old Male Infant – Section: Discussion Surgical removal, lancing, or any kind of active intervention is explicitly discouraged. These cysts pose no risk to feeding, breathing, or tooth development. The only real clinical task is recognizing them for what they are so that nobody does something unnecessary.
Why Parents Worry and When That Worry Is Justified
White bumps inside a newborn’s mouth can look genuinely alarming if you don’t know what you’re looking at. Parents sometimes mistake these cysts for infections, oral thrush, or emerging teeth, and pediatricians sometimes encounter them in the context of a worried phone call rather than a calm well-baby visit. This parental anxiety is well documented and completely understandable.13PubMed Central. Oral Lesions in Neonates – Section: Abstract The bumps appear without warning, sometimes in clusters, on a baby who seems otherwise fine.
The key distinction is that Bohn’s nodules and Epstein pearls are firm, smooth, and non-tender, and they sit on the palate or gum ridges. Oral thrush (a yeast infection caused by Candida) typically appears as white patches that coat the tongue and inner cheeks and can be scraped off to reveal reddened tissue underneath. Inclusion cysts cannot be scraped off; they’re solid structures embedded in the tissue. Natal teeth, which are actual teeth present at birth, are another thing parents might confuse with alveolar cysts. Natal teeth are harder, more tooth-shaped, and anchored in the ridge in a way that a soft cyst is not.
A case report of a Bohn’s nodule persisting to seven months old highlights that while most cysts vanish in the first weeks, some can linger. Even in that case, the recommendation was reassurance and monitoring rather than intervention, because the natural course remained benign.14Acta Medica Philippina. Bohn’s Nodule: A Rare Case in a 7-month-old Male Infant – Section: Discussion The published consensus in pediatric dentistry is clear: when in doubt, observe.15BMJ Case Reports. Dental lamina cysts in a newborn infant – Section: Abstract
That said, if a lump in a newborn’s mouth is growing rapidly, changing color, bleeding, or interfering with feeding, it warrants prompt evaluation. Those features would point toward something other than an inclusion cyst, and the differential diagnosis includes rare conditions like congenital epulis (a benign tumor of the gums) and other soft-tissue lesions that do sometimes need removal.
The Diagnostic Gray Area
One of the more frustrating aspects of these cysts is that clinicians themselves sometimes struggle to classify them cleanly. Because the three types of inclusion cysts overlap in appearance and can sit in ambiguous locations, the only way to be absolutely certain which type you’re dealing with is histopathological examination, meaning looking at the tissue under a microscope.16HCA Healthcare Journal of Medicine. An Unusual Case of Bilateral Upper and Lower Oral Cavity Cysts in a Newborn – Section: Conclusion In practice, nobody biopsies a harmless cyst that’s going to disappear on its own, so most diagnoses are made clinically based on location.
This means that when you read prevalence figures reporting, say, 30% Bohn’s nodules and 40% Epstein pearls in a given sample, there’s some inherent fuzziness. A cyst near the palatal midline is called an Epstein pearl; shift it a few millimeters laterally and it might be classified as a Bohn’s nodule. Different examiners applying different judgment calls will sort the same cysts into different categories. This is a known limitation of the classification system rather than a failure of any individual study.
For parents, this gray area doesn’t matter. The management is identical regardless of which subtype the cyst is: leave it alone and let it resolve. The classification is primarily useful for researchers tracking prevalence patterns and for clinicians ruling out conditions that are not self-limiting.
When Cysts Appear in Unusual Presentations
Most of the time, oral inclusion cysts are small, few in number, and easy to identify. Occasionally, though, they show up in a pattern that raises eyebrows. Case reports describe newborns with unusually large clusters of cysts covering wide areas of the palate and gums, or cysts that are large enough to raise initial concern about whether they might interfere with feeding.17Journal of Medical Case Reports. Unusual symptomatic inclusion cysts in a newborn: a case report – Section: INTRODUCTION Even in these unusual presentations, the cysts remain benign. Individual cysts are typically one to three millimeters across, and even when multiple cysts cluster together, they don’t fuse into a larger mass or erode the underlying tissue.
These atypical cases are worth knowing about because they’re the ones most likely to prompt an anxious trip to the pediatrician or dentist. A parent who has read that “a few white dots on the palate” are normal may still panic when their baby’s gums are studded with dozens of tiny bumps. The evidence is consistent that even extensive presentations follow the same benign course.18BMJ Case Reports. Dental lamina cysts in a newborn infant – Section: Abstract
Milia and the Skin Connection
If you’ve heard of milia, the tiny white bumps that commonly appear on a newborn’s nose and cheeks, you already have an intuitive sense of what Epstein pearls are. Milia are tiny keratin-filled cysts in the skin, and Epstein pearls are essentially the same thing occurring on the oral mucosa. The twin study that found Epstein pearls in 88% of babies also found milia in about 83%, and the two conditions tracked closely together.19Pediatric Dermatology. Physiological skin manifestations in twins: association with maternal and neonatal factors Both are part of the same general phenomenon: developing skin and mucous membrane tissue shedding keratin into small pockets that haven’t yet opened to the surface. Both resolve on their own as the epithelium matures.
This connection is worth keeping in mind because it frames these oral cysts not as something going wrong but as a predictable side effect of how epithelial tissues develop. A baby whose skin produces milia and whose palate produces Epstein pearls is just a baby whose tissues are doing exactly what developing tissues do. The process of clearing these cysts is itself part of normal maturation, like shedding lanugo hair or losing the vernix coating. Pediatric dentists and dermatologists view all of these as physiological findings rather than pathological ones, which is why you’ll sometimes see them grouped together in the literature on normal newborn findings rather than in the literature on disease.