Teething (infants) - Causes, Treatment & When to See a Doctor

What is Teething (infants)?

Teething is the natural process by which an infant’s primary (baby) teeth break through the gums. It typically begins around 4–7 months of age but can start as early as 3 months or as late as 12 months. The eruption of each tooth can cause varying degrees of discomfort because the tooth must push through the protective layer of gum tissue.

While teething is a normal developmental milestone, the associated symptoms—drooling, gum swelling, irritability, and changes in feeding—can be distressing for both baby and caregiver. Understanding what to expect, how to soothe the child, and when to seek medical attention helps parents navigate this stage safely.

Common Causes

Teething itself is not a disease; however, several conditions can mimic or exacerbate the discomfort of teething. Being aware of these can prevent unnecessary worry and ensure that another problem isn’t being missed.

• Normal tooth eruption – The physiological process of a tooth moving through the gum.
• Gum inflammation (gingivitis) – Mild swelling that often accompanies each erupting tooth.
• Oral infection (e.g., thrush) – A fungal overgrowth that can appear when the mouth is moist from increased drooling.
• Ear infections – Sometimes ear pain is misinterpreted as teething pain because the nerves share pathways.
• Upper respiratory infections – Colds and sinus congestion can increase drooling and irritability, mimicking teething.
• Reflux or gastro‑esophageal reflux disease (GERD) – Acid irritation can cause fussiness that coincides with the teething timeline.
• Allergic reactions – Food or environmental allergies can cause oral irritation and be confused with teething.
• Dental caries (early childhood cavities) – Rare in very young infants but can develop after several months of frequent bottle feeding.
• Trauma to the gums – Biting on a hard object or aggressive teething toys may cause localized swelling.
• Systemic illness – Fever or malaise from a viral infection may coincide with the usual teething window, leading caregivers to attribute all symptoms to teething.

Associated Symptoms

Most infants experience a predictable set of signs during tooth eruption. The intensity varies from child to child and from one tooth to the next.

• Increased drooling (often leading to a chapped chin)
• Swollen, tender gums that may appear red or pink
• Fussiness or irritability, especially in the evening
• Changes in eating patterns—refusal of a bottle or breast, or a desire to bite
• Chewing on fingers, toys, or other objects more frequently
• Light fever (usually < 38°C / 100.4°F) – not a true infection but a mild rise in temperature
• Disturbed sleep or frequent waking
• Occasional loose stools (some parents report this, though evidence is limited)

When to See a Doctor

Most teething episodes are mild and resolve without medical intervention. However, certain signs suggest that another condition is present, and prompt evaluation is warranted.

• High fever (≥38.5°C or 101.3°F) lasting more than 24 hours
• Persistent vomiting or diarrhea leading to dehydration
• Rash that spreads beyond the chin area or looks like a severe allergic reaction
• Excessive crying that does not improve with typical soothing measures
• Ear pulling combined with fever, indicating a possible ear infection
• Signs of oral infection: white patches that cannot be wiped away, foul odor, or difficulty swallowing
• Any sudden change in behavior, such as lethargy or loss of appetite for more than 2 days
• Difficulty breathing, wheezing, or persistent cough

When any of these red flags appear, contact your pediatrician or seek urgent care.

Diagnosis

Diagnosis of teething is primarily clinical—based on the child’s age, reported symptoms, and a visual oral exam.

1. History taking – Provider asks about the onset of symptoms, feeding changes, sleep patterns, and fever.
2. Physical examination – Inspect the gums for swelling, eruption sites, and any lesions (e.g., thrush).
3. Ear examination – Because ear pain can masquerade as teething, the clinician often checks the tympanic membrane.
4. Temperature check – Rule out febrile illness.
5. Occasional labs – Rarely needed, but a rapid strep test or CBC may be ordered if infection is suspected.

The diagnosis is usually straightforward; if an abnormal finding is identified, the provider will treat that specific condition.

Treatment Options

There is no “cure” for teething because it is a natural growth process. Management focuses on comfort and symptom relief.

Home Care

• Cold teething rings – Refrigerated (not frozen) silicone rings soothe swollen gums.
• Wet washcloth – A clean, cold, damp cloth can be chewed on safely.
• Gentle gum massage – Using a clean finger, gently rub the gums for a few minutes.
• Breast‑milk or formula – Continue regular feeding; a slightly cooler bottle may be soothing.
• Stay hydrated – Offer water in a sippy cup (if age‑appropriate) to prevent dehydration from excess drooling.
• Chamomile tea (infant‑safe) – A tiny amount (1‑2 oz) appears soothing for some babies; ensure it is caffeine‑free and not sweetened.

Medical Interventions

• Acetaminophen (Tylenol) – Dosage based on weight (15 mg/kg) can reduce mild to moderate pain or fever. Avoid ibuprofen in infants <6 months unless specifically prescribed.
• Topical anesthetic gels – Products containing benzocaine are **not** recommended for infants under 2 years due to risk of methemoglobinemia. Instead, a pediatrician may suggest a mild, alcohol‑free oral numbing gel such as Orajel® Baby with <5% lidocaine, used sparingly.
• Prescription antibiotics – Only if a secondary bacterial infection (e.g., gum abscess) is confirmed.
• Antifungal medication – For oral thrush (nystatin oral suspension).

Never give aspirin to infants, and avoid over‑the‑counter teething tablets or homeopathic “teething necklaces,” which have been linked to choking hazards and lack proven benefit.

Prevention Tips

While you cannot stop a baby’s teeth from emerging, several strategies can minimize discomfort and reduce the risk of complications.

• Start with soft, BPA‑free silicone teething toys at about 4 months.
• Keep the baby’s chin clean and dry to prevent skin irritation—apply a thin layer of hypoallergenic moisturizer or zinc‑oxide ointment.
• Rotate teething toys regularly to keep them clean; wash them according to manufacturer instructions.
• Offer a chilled (not frozen) teething ring after meals to combine soothing with oral hygiene.
• Maintain regular well‑child visits; the pediatrician can monitor tooth eruption and advise on oral care.
• Introduce a soft baby toothbrush once the first tooth appears, using a smear of fluoride‑free toothpaste.
• Avoid giving sugary drinks or prolonged bottle‑feeding, which can predispose to early decay.

Emergency Warning Signs

Key Takeaways

Teething is a normal developmental stage that usually begins between 4 and 7 months of age. Typical signs include increased drooling, gum swelling, irritability, and a mild temperature rise. Most infants recover with simple home measures such as cold teething rings, gum massage, and age‑appropriate analgesics (acetaminophen).

Parents should remain vigilant for red‑flag symptoms—high fever, persistent vomiting, ear infection signs, or severe gum swelling—that suggest an underlying illness rather than ordinary teething. Prompt medical evaluation ensures proper treatment and peace of mind.

References:

• Mayo Clinic. “Teething: Tips to Soothe Your Baby.” Mayoclinic.org
• American Academy of Pediatrics. “Oral Health Topics: Teething.” HealthyChildren.org
• Centers for Disease Control and Prevention. “Dental Development in Children.” CDC.gov
• National Institute of Dental and Craniofacial Research. “Teething FAQs.” NIDCR
• World Health Organization. “Childhood Oral Health.” WHO.int