What Is Considered a High Fever in an Infant?

Infants may experience fevers as a result of viral infections or bacterial infections. Some infants may also have fevers when teething. Fevers are generally not dangerous, but in some cases, emergency medical care is warranted.

Function

• According to Dr. Sears, fevers are an infant's body's natural reaction to infection. Fevers may not always indicate an emergency.

Significance

• A fever of 99 to 100.9 degrees Fahrenheit (F) is considered a low-grade fever. A fever of 101 to 103.5 degrees F is considered a common fever, and a fever greater than 103.6 degrees F is considered to be a high fever.

Time Frame

• Infants who are younger than 6 weeks old should receive prompt medical treatment for any fever greater than 101 degrees F. Fevers that range from 101 to 103 degrees F and a fever of 104 degrees F that decreases quickly with over-the counter treatment are treatable at home; however, a doctor's appointment is recommended within a day.

Treatment

• Low-grade fevers do not need to be treated unless they are bothering the child. Common fevers and high fevers may be treated with Tylenol (acetaminophen) and Motrin (ibuprofen). Alternating between Tylenol and Motrin is usually effective.

Warning

• Fevers that are accompanied by any of the following symptoms may indicate a medical emergency: lethargy, irritability, seizures, stiff neck, diarrhea and vomiting.