Many parents observe their baby developing a fever around the same time new teeth begin to emerge, leading to a common question about the connection between teething and elevated body temperature. This widespread belief often causes confusion and concern regarding what constitutes a normal teething symptom versus a sign of illness. Understanding the differences between these situations is important for parents to provide appropriate care for their infants.
Teething and Body Temperature
While many believe teething causes a significant fever, scientific evidence indicates this is not the case. Teething may lead to a slight elevation in a baby’s body temperature, typically remaining below 100.4°F (38°C). A temperature at or above 100.4°F (38°C) is considered a true fever, often a sign of an underlying infection or illness.
If a baby experiences a temperature of 100.4°F (38°C) or higher during teething, it is likely due to an unrelated condition, such as a cold or other viral infection. Infants between 6 and 12 months, when teething begins, are more susceptible to infections as their immune protection from the mother starts to wane. Exploring their environment by putting objects into their mouths also increases exposure to germs. Therefore, a true fever should always prompt investigation for causes other than teething.
Common Signs of Teething
Teething commonly presents with several recognizable symptoms distinct from those of an illness. Babies often experience increased drooling, which can lead to a rash around the mouth, chin, or chest from constant moisture. Swollen, tender, or red gums are frequently observed as teeth prepare to break through the gum line. The discomfort often prompts babies to gnaw or chew on objects more frequently, seeking relief.
Other typical signs include mild fussiness or irritability, changes in sleeping patterns, and a temporary decreased interest in solid foods. Babies might rub their cheeks or pull at their ears on the side where a tooth is erupting. While these symptoms can cause some discomfort, they are mild and localized, resolving within a few days around the emergence of a new tooth.
When to Seek Medical Advice
Parents should seek medical advice if a baby’s temperature reaches 100.4°F (38°C) or higher, as this indicates a fever unlikely to be caused by teething alone. For infants younger than three months, any fever of 100.4°F (38°C) or above warrants immediate medical attention. A fever is the body’s response to an infection and requires serious attention.
Medical consultation is advised if a fever persists for more than 24 to 72 hours, regardless of the baby’s age. If a fever is accompanied by other concerning symptoms such as vomiting, diarrhea, a widespread rash (not just from drool), lethargy, difficulty breathing, inconsolable crying, difficulty awakening, or refusal to drink fluids, these signs indicate an illness requiring professional evaluation. Distinguishing between typical teething discomfort and symptoms of an illness helps ensure babies receive appropriate and timely care.