Eruption Cysts in Infants: Causes, Symptoms, and Treatment

Quick Answer

Don’t panic! Eruption cysts (also called teething cysts) often look scary but are usually benign and typically resolve on their own without treatment. They appear as bluish-purple or clear bubbles on your baby’s gums when a new daant (tooth) is about to come through. In most cases, the cyst bursts naturally when the tooth erupts. Medical intervention is rarely needed.

What is an Eruption Cyst?

An eruption cyst is a fluid-filled sac that forms over a tooth that’s about to break through the gum. Think of it as a little “water bubble” on the masoodhe (gums) where the daant is trying to come out.

Key Facts Parents Should Know:

• Very common: Happens in many babies during teething (daant aana)
• Usually benign: Looks worse than it is
• Self-resolving: Goes away on its own in most cases
• Usually painless: Rarely causes significant discomfort
• Not an infection: An eruption cyst itself is not an infection

What Does an Eruption Cyst Look Like?

The appearance can vary:

Type	Appearance	Cause
Clear/translucent	See-through, dome-shaped swelling	Clear fluid inside
Bluish-purple	Blue or purple bump	Contains some blood (called eruption hematoma)
Reddish-brown	Darker colored bump	Blood mixed with fluid

Common Locations:

• Usually appears where front teeth (incisors) come in
• Can occur where molars erupt (less common in infants, more in toddlers)
• Most common on lower front gums

Age-Specific Information

Babies 4-12 Months (First Teeth)

• Most eruption cysts occur during this time
• Usually over the lower front teeth first
• May see one or two at a time
• Resolves within 1-2 weeks typically

Toddlers 12-24 Months

• May occur with lateral incisors or first molars
• Molars can have larger cysts
• Same self-resolving pattern

Children 6-9 Years (Permanent Teeth)

• Can occur when adult teeth come in
• More common with first permanent molars
• Same treatment approach - usually observation

Causes of Eruption Cysts

Eruption cysts happen naturally during teething. Here’s why:

• Normal teething process:
• When a tooth pushes up toward the gum surface, fluid can accumulate between the tooth and gum tissue
• Soft tissue separation:
• The dental follicle (protective covering around the tooth) separates slightly
• Fluid fills this space, creating the cyst
• Blood vessel involvement:
• Sometimes small blood vessels break, causing blood to mix with fluid
• This creates the blue-purple color (eruption hematoma)

Risk Factors (Don’t Worry - These Don’t Mean Problems!):

• Early tooth decay (rare in infants)
• Crowded teeth
• Thick gum tissue
• Genetics - some families see this more often

Symptoms to Watch For

Normal Signs:

• Bluish-purple or translucent bump on gums
• Soft, fluid-filled swelling
• Baby may touch or bite at the area
• Slight increase in drooling
• Mild fussiness

Reassuring Signs:

• Bump is soft, not hard
• No spreading redness
• No fever
• Baby is eating normally
• No pus or bad smell

When to See a Doctor

You Can Wait and Watch If:

• Bump is small (less than 1 cm)
• Baby is comfortable
• No fever
• Eating normally
• Been there less than 2 weeks

See Your Pediatrician or Dentist If:

• Cyst lasts more than 2-3 weeks without the tooth coming through
• Baby seems very uncomfortable or refuses to eat
• There’s spreading redness or swelling beyond the cyst
• You see pus or there’s a bad smell
• Baby has a fever — and note: in a baby under 3 months, any fever of 100.4°F (38°C) or higher is a same-day emergency. Go to a doctor the same day; do not just give medicine and wait.
• Multiple large cysts at once
• The cyst is very large (bigger than a pea)
• You’re just worried and want reassurance!

Home Care for Eruption Cysts (Gharelu Upchar)

What You CAN Do:

• Cold Teething Toys:
• Offer chilled (not frozen) teether
• Helps soothe the area
• Pressure may help tooth break through
• Gentle Gum Massage:
• Wash your hands well with soap and water first, then rinse
• With a clean finger, gently rub the area around (not directly on) the cyst
• Can provide relief
• Chilled Cloth:
• Wet a clean cloth, chill in fridge
• Let baby chew on it
• Cold Foods (only for babies already started on solids, 6+ months):
• Chilled fruit or vegetable offered in a mesh feeder, or pieces large enough to hold but too big to swallow whole
• Avoid hard, round, or small pieces (like cucumber sticks or apple chunks) given directly — these are choking hazards
• Never give anything by mouth except breast milk or formula before 6 months
• Always stay within arm’s reach while your baby is feeding
• Keep Mouth Clean:
• Wipe gums with clean, wet cloth after feeds
• Helps prevent any secondary infection

What NOT to Do:

• Don’t pop or puncture the cyst: This can cause infection
• Don’t apply numbing gels with benzocaine: Not recommended for babies
• Don’t use ice directly: Too cold can damage delicate gum tissue
• Don’t apply honey: Not safe for babies under 1 year
• Don’t ignore it if symptoms worsen: Trust your instincts

Medical Treatment (When Needed)

In rare cases where the cyst doesn’t resolve or is very large:

Simple Incision:

• Done by a pediatric dentist
• Quick procedure under local anesthesia
• Small cut allows fluid to drain
• Tooth usually erupts soon after
• Minimal discomfort

When Surgery is Recommended:

• Cyst persists more than 4-6 weeks
• Tooth is not erupting
• Cyst is infected
• Very large cyst causing feeding problems Reassurance: Most eruption cysts NEVER need treatment. They burst on their own when the tooth pushes through.

Preventing Eruption Cysts

There’s no proven way to prevent eruption cysts since they’re a natural part of teething. However, good oral care helps overall:

• Clean gums daily:
• Even before teeth appear
• Use soft, wet cloth
• Limit sugary foods:
• No fruit juice in bottles
• No sugar on pacifiers
• Regular dental check:
• First visit by age 1
• Teething toys:
• Safe pressure on gums may help teeth come through smoothly

Expert Insight: As our pediatricians remind parents: teething is a wide, normal range. First teeth usually appear between 4 and 12 months. If no teeth have come in by about 15 months, mention it at your next pediatric visit.

FAQs

Q: Is an eruption cyst the same as a tooth abscess?

A: No. An eruption cyst is usually benign and is not an infection. A tooth abscess is an infection that causes fever, pus, and needs treatment. Eruption cysts are soft, not painful, and don’t have pus.

Q: My baby’s cyst is dark purple. Should I be scared?

A: Usually there’s no need to worry. A dark purple or blue cyst means there’s a little blood mixed with the fluid (called an eruption hematoma). This is a common variation and usually resolves just like a clear cyst. If it keeps growing, becomes hard, or your baby is in pain, have a dentist check it.

Q: Will the cyst damage my baby’s tooth?

A: In nearly all cases, no. The tooth is developing underneath, and once the cyst resolves and the tooth erupts, the gum usually heals well. If you have concerns, your pediatric dentist can check.

Q: How long does an eruption cyst last?

A: Most eruption cysts resolve within 1-2 weeks when the tooth erupts. Some may last up to 3-4 weeks. If it persists longer, consult a dentist.

Q: Can eruption cysts happen with every tooth?

A: They can, but usually don’t. Most babies get them only once or twice during the teething process, or not at all.

Q: Should I take my baby to the dentist for an eruption cyst?

A: For most eruption cysts, no dental visit is needed. See a dentist if the cyst lasts more than 3 weeks, is very large, appears infected, or if you’re worried.

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This article was reviewed by the Babynama Pediatricians team. Last updated: June 2026.

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General information for Indian parents, not a substitute for your pediatrician. In an emergency, call 112 or 108.