If you measured your temperature under your armpit, then 99°F or higher indicates a fever . Temperature measured rectally or in the ear is a fever at 100.4°F (38°C) or greater. An oral temperature of 100°F (37.8° C) or more is a fever.
Digital thermometers At any age, you can use a digital thermometer under the arm and add 1 degree to get a general sense of what the true temperature might be (just don't count on that as 100-percent reliable.)
Most thermometers claim to be accurate within 0.1–0.3°C . But our team of experts found that some personal thermometers can be off by as much as 0.83°C, meaning that a healthy temperature of say, 37.4°C could be misread as a fever of 38.2°C, causing unnecessary alarm and even unwarranted trips to the emergency room.Sep 28, 2020
Differences between measurements can also result from the following factors: The thermometer is not the same temperature as the room you are measuring in (Example: it has been in a much warmer or colder room). The thermometer is inserted into the ear canal at a different depth or angle.
Ensure there is no air left in the mouth while keeping the thermometer in place . Air in the mouth will cause temperature differences in the mouth tissue, making readings inaccurate. Wait at least 20 seconds even if the thermometer indicates it is already ready. You may also measure twice.
The FDA writes that a draft, direct sunlight, or a radiant heat source could affect the temperature reading and make it inaccurate . The reading could also be inaccurate if a person has been wearing a head wrap or headband before taking it or if they have sweat or dirt on their forehead.
Rectal temperatures are considered most accurate indication of the body's temperature. Oral and axillary temperature readings are about ½° to 1°F (.Mar 23, 2020
Research has shown that, when used correctly, infrared or no-contact thermometers are just as accurate as oral or rectal thermometers . No-contact thermometers are popular among pediatricians, as kids often squirm around when trying to get a temperature read, but it also holds true in mass temperature screenings.
Place the sensor head at the center of the forehead . Slowly slide the thermometer across the forehead toward the top of the ear. Keep it in contact with the skin. Stop when you reach the hairline.
It can be the temple, the center of the forehead, or even the area near the ear . Any other place that is not recommended by the manufacturer may result in poor body temperature measurement or incorrect reading.
While typically 98.6°F (37.0°C) is considered a “normal” temperature, some studies have shown that "normal" body temperature can be within a wide range, from 97°F (36.1°C) to 99°F (37.2°C). Before NCITs are used, it is important to understand the benefits, limitations, and proper use of these thermometers.
Most thermometers we tested covered a range from roughly 96 °F to 109 °F with an accuracy of ±0.4 degree . Ear and forehead infrared thermometers, both in-ear/on-forehead and contactless, are accurate enough to properly track a fever and are generally easier to use than stick thermometers.
The National Institute of Health research said that a forehead thermometer's readings can become inaccurate if the child's forehead is sweating or if the child is moving . These two variables can be rather difficult to control when it comes to children.
A forehead (temporal) scanner is usually 0.3°C (0.5°F) to 0.6°C (1°F) lower than an oral temperature .
To test your thermometer: