Teething is a normal part of infant development, marking the emergence of first teeth. Many parents wonder if teething causes a fever. This article clarifies the relationship between teething and fever, guiding parents on what to expect and when to seek medical advice.
Common Teething Signs
Babies typically begin teething between 4 and 12 months, exhibiting common symptoms. Increased drooling may lead to a rash around the mouth from excess saliva. Infants often become more irritable or fussy, reflecting their discomfort.
Gums may appear swollen, red, or tender. This discomfort prompts babies to gnaw or chew on objects to relieve pressure. Some babies might also experience slight changes in sleep patterns or show less interest in solid foods, though adequate intake of breast milk or formula should continue. These signs are localized to the mouth area and are typical responses to teething.
Fever: Is It Teething or Something Else?
Many parents associate teething with a fever, but teething itself does not cause a true fever. A true fever is defined as a body temperature of 100.4°F (38°C) or higher. While a baby’s temperature may slightly increase during teething, it typically remains below this threshold. A slight temperature elevation may occur on the day a tooth erupts or the day before, but not to the level of a fever.
If an infant develops a fever while teething, it is more likely due to an underlying illness coinciding with the teething period. Babies between 6 and 12 months, when teething commonly occurs, are also susceptible to common childhood infections like colds or ear infections. This increased susceptibility is because they explore their world by putting objects in their mouths, which can introduce germs. Immune protection from the mother begins to wane around this age, making them more prone to infections.
The misconception that teething causes fever stems from this coincidental timing. Parents might observe mild discomfort and a slightly elevated temperature, attributing a fever to teething. However, symptoms such as a high fever, diarrhea, vomiting, or widespread rash are not typical signs of teething and usually indicate another health issue.
When to Consult a Doctor
Seek medical attention for a baby with a fever, regardless of whether teething is suspected. For infants under 3 months, any rectal temperature of 100.4°F (38°C) or higher warrants immediate medical evaluation. Fevers in very young infants can be the only sign of a serious underlying illness.
For babies 3 months or older, medical consultation is advised if the fever is 102.2°F (39°C) or higher. Contact a healthcare provider if a fever lasts longer than 24 to 48 hours. Other concerning symptoms include:
Lethargy
Decreased feeding or refusal to drink liquids
Persistent vomiting or diarrhea
A rash that spreads beyond the face
Difficulty breathing
Unusual crying that cannot be soothed
Any signs of dehydration, such as fewer wet diapers
Comfort measures like teething rings or gum massage can help with mild teething discomfort, but they do not treat fever. Seek medical advice for any fever that raises concern.