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There are four ways to take a child's temperature:
Taking a rectal temperature provides the most accurate measure of core body temperature. However, taking a rectal temperature is not recommended for babies or young children as this might cause rectal injuries.
Taking a temperature under the armpit is not as exact, but it will let you know if your child has a fever. When children reach the age of six, they can have their temperature taken by mouth.
Ear thermometers are more expensive. Fever strip and pacifier thermometers do not give an accurate temperature. Do not use a mercury thermometer. Mercury is toxic and the thermometer could break. Ask the pharmacist any questions you may have when buying a thermometer.
A digital thermometer is best for taking temperatures by the armpit and mouth. Always remember to press the button to turn the thermometer "on." Follow the instructions for ear, armpit or mouth method. When you hear the "beep," remove the thermometer and read the temperature on the display.
This method is used for newborns and children under six years of age.
This method should not be used for children under six years of age.
To clean the thermometer, wash only the tip with soap and warm (not hot) water and wipe off with alcohol. Dry well.
These steps can be followed, however, follow the instructions for your specific thermometer.
Take an adult's temperature by mouth, in the ear or under the armpit. The armpit method is less accurate and is normally only used if the person is extremely drowsy or not clear mentally.
To take an adult's temperature, follow the same method as used for children when using a digital thermometer.
The normal temperature range varies, depending on the method you use:
Armpit: 35.5°C to 37.4°C (95.9°F to 99.3°F)
Mouth: 36.0°C to 37.5°C (96.8°F to 99.5°F)
Ear: 36.5°C to 38°C (97.7°F to 100.4°F)
Rectum: 36.5°C to 38°C (97.7°F to 100.4°F)
Temperatures may vary throughout the day, rising as much as one degree in the morning and reaching a maximum during the late afternoon. Mild increases can be caused by exercising, too much clothing or bedding, taking a hot bath or being outside in hot weather.
When a child is sick with an infection, it is normal to have a fever (temperature higher than 38°C (100.4°F)). A fever is part of the normal process of fighting an infection. A fever will not hurt a child. Usually, it goes away after three days.
| Babies younger than three months old should see a doctor sooner when they have a fever. During the first three months of life, babies are not always able to fight infections, so they need to see a health care professional sooner than older babies and children with fevers. |
Older children with fever who seem otherwise well and are drinking enough liquid can be treated at home. The degree of a fever does not indicate how serious the illness is, but rather the child's behaviour, overall appearance and other symptoms such as headache, stiff neck, nausea, and vomiting are generally the most important factors. A fever with other symptoms may mean a more serious illness.
If you have questions or concerns about you or your child's temperature, contact your health care provider or the BC NurseLine.
Adapted with the permission of Alberta Health and Wellness
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