Hello there! As a healthcare professional with a focus on patient care and well-being, I'm here to provide you with accurate and helpful information regarding your health concerns.

When it comes to determining whether a body temperature of 99 degrees Fahrenheit is considered a fever, it's important to consider the method of measurement and the individual's normal body temperature. Body temperature can vary depending on the time of day, activity level, and even the person's baseline temperature.

Typically, a fever is defined as a body temperature that is higher than the normal range. The normal body temperature for a healthy adult is generally accepted to be around 98.6 degrees Fahrenheit (37 degrees Celsius). However, this is an average, and individual normal temperatures can be slightly higher or lower.

The method of measuring body temperature can also affect the reading. Different parts of the body have different normal temperature ranges:
- **Rectal, ear, or temporal artery temperature**: A temperature of 100.4 degrees Fahrenheit (38 degrees Celsius) or higher is generally considered a fever.
- Oral temperature: A reading of 100 degrees Fahrenheit (37.8 degrees Celsius) or higher is typically classified as a fever.
- Armpit (axillary) temperature: A temperature of 99 degrees Fahrenheit (37.2 degrees Celsius) or higher is often seen as the threshold for a fever.

Given this information, a temperature of 99 degrees Fahrenheit taken from the armpit could be considered the lower end of what might be classified as a fever, especially if it's a significant increase from the person's normal temperature. However, it's also important to note that some people may have a normal body temperature that is lower than 98.6 degrees Fahrenheit, and for them, even a temperature of 99 degrees Fahrenheit could be a sign of a fever.

It's also worth mentioning that a single temperature reading isn't always enough to diagnose a fever. It's more useful to look at trends over time. If a person's temperature is consistently higher than their normal range, or if they are experiencing other symptoms such as chills, sweating, or feeling unwell, it's more likely that they have a fever.

In conclusion, while a temperature of 99 degrees Fahrenheit taken from the armpit might be considered borderline for a fever in some cases, it's essential to consider the individual's normal temperature, the method of measurement, and any accompanying symptoms. If you're concerned about a fever or any other health issue, it's always a good idea to consult with a healthcare professional for a proper evaluation and guidance.

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A fever is a rise in body temperature. ... Rectal, ear or temporal artery temperature of 100.4 (38 C) or higher. Oral temperature of 100 F (37.8 C) or higher. Armpit temperature of 99 F (37.2 C) or higher.Sep 22, 2017read more >>