Teething Signs vs Illness
Drooling, a desire to chew, swollen or tender gums, and mild irritability can occur around tooth eruption. A baby who looks sick, feeds poorly, or has a meaningful fever needs a broader assessment.
Summary
Observe the whole baby, not only the mouth. Teething may accompany a slight temperature rise but should not be used to explain a temperature above 38.3°C. Record the measured temperature and method, feeds, wet diapers, vomiting or diarrhea, rash, breathing, alertness, and duration. Contact the pediatrician when the baby appears particularly miserable, has higher fever, drinks much less, produces fewer wet diapers, or has persistent symptoms. For a baby 3 months old or younger, a rectal temperature of 38°C (100.4°F) or higher needs an immediate pediatrician call even without other symptoms.
Recognize common teething changes
Tooth eruption often comes with drooling, a wish to chew, tender or swollen gums, and mild irritability. Timing varies widely, and a later first tooth alone does not prove a problem. Observe several ordinary periods rather than forcing the mouth open repeatedly. Note which gum area looks different, how long the change lasts, and whether the baby still feeds, wakes, interacts, breathes, and urinates as usual. A mouth clue is useful only when interpreted with the baby's full condition.
Separate teething from illness
A small temperature rise within the normal range can accompany teething, but a true fever should not be attributed to it. If a baby is 3 months old or younger and has a rectal temperature of 38°C (100.4°F) or higher, call the pediatrician immediately, even without other symptoms.
AAP teething guidance also says a temperature above 101°F or 38.3°C is probably not from teething. This does not mean waiting for that temperature before seeking care. Measure rather than guessing by touch, record the method, and follow age-specific fever advice. Vomiting, diarrhea, widespread rash, breathing change, marked lethargy, poor feeding, dehydration, or a baby who appears particularly miserable needs broader assessment. Do not delay care because a tooth seems close to erupting. Young infants or babies with medical conditions may need a lower threshold for contact.
Know when to call
Contact the pediatrician for significant fever, poor intake, fewer wet diapers, persistent vomiting or diarrhea, unusual sleepiness, or a baby who seems unwell. Contact a dentist promptly for a chipped, displaced, loose, darkening, or lost baby tooth; spreading mouth swelling; pus; persistent bleeding; or pain that disrupts feeding and sleep. After injury, do not push a tooth back or replace a knocked-out baby tooth. Breathing or swallowing difficulty, rapidly spreading face or neck swelling, uncontrolled bleeding, seizure, blue or gray color, or difficulty waking requires emergency help.
Soothe without numbing the mouth
Wash your hands and rub the tender gum gently with one clean finger. A simple firm rubber teether can be cooled in the refrigerator and offered while an adult watches. Do not freeze it: very hard frozen material can injure sensitive gums. Stop if the baby coughs, gags repeatedly, becomes distressed, or the object is damaged. Comfort, holding, and a calmer routine may help. Ask a clinician before giving pain medicine because the product, dose, age, weight, and health history all matter.
Avoid products with serious risks
FDA and AAP sources advise against benzocaine or lidocaine teething products because they provide little benefit and can cause serious harm. Homeopathic teething tablets have no established benefit and have raised safety concerns. Amber and other teething necklaces do not relieve pain and create choking or strangulation hazards. Never tie a teether to the baby's neck, clothing, crib, or seat with a long cord. Advertising language such as natural or fast acting does not replace evidence, an ingredient review, or professional guidance.