Is a body temperature of 99 degrees Fahrenheit considered a fever?

From the Guidelines

99 degrees Fahrenheit is not considered a fever according to the most recent guidelines. The normal body temperature range is subject to various factors such as age, gender, diurnal variation, and sampling site 1. The United States Centers for Disease Control and Prevention definition of fever in the diagnosis of hospital-acquired infections is a measured temperature of greater than 38°C, which is equivalent to 100.4°F 1.

Some key points to consider:

• The definition of fever can vary depending on the context, such as age, time of day, and individual baseline temperature 1.
• For most adults, a temperature of 100.4°F (38°C) or higher is more definitively classified as a fever requiring attention 1.
• Low-grade fevers like 99°F often don't require medication unless accompanied by discomfort.
• If you experience a temperature of 99°F, monitor it for changes, stay hydrated, and rest 1.
• The body raises its temperature as a defense mechanism against infections, as many pathogens struggle to survive at higher temperatures while the immune response becomes more efficient.

It's essential to note that the absence of fever in patients with infection is associated with worse outcomes, and not all patients with infection manifest fever 1. Therefore, it's crucial to consider other symptoms and factors when evaluating a patient's condition.

In terms of management, it's recommended to monitor the temperature for changes, stay hydrated, and rest if experiencing a low-grade fever like 99°F 1. If needed, over-the-counter medications like acetaminophen (Tylenol) or ibuprofen (Advil, Motrin) can help reduce fever and discomfort. However, it's always best to consult with a healthcare professional for personalized advice.

From the Research

Definition of Fever

• Fever is a frequent cause of admission to the Emergency Department (ED) worldwide 2

Normal Body Temperature

• Normal body temperature is typically considered to be around 98.6 Fahrenheit, but it can vary from person to person 2

Fever Threshold

• A body temperature of 99 Fahrenheit is slightly elevated, but it may not necessarily be considered a fever in all cases 2

Treatment of Fever

• The treatment of fever depends on the underlying cause, which can be bacterial, viral, or immune/neoplastic 2
• Paracetamol 1,000 mg and Paracetamol/Ibuprofen 500/150 mg are common treatments for fever, with the choice of treatment depending on the etiology of the fever 2