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Your temperature (TEM-pruh-chur) is how warm or cold your body is. Normal temperature for a child is 98°F to 99°F or 37°C. The small circle (°) means “degrees.” Anything over 100.4°F or 38°C is a fever. (See “Words to Know” for “F” and “C.”)
There are many ways to check your child's temperature. Always use a digital (DIJ-uh-tul) thermometer (thur-MOM-uh-tur). These show the temperature in numbers in a little window.
Don’t use a mercury thermometer (the kind with silver liquid inside). They are dangerous if they break.
This is how you read and say the temperature:
100.2° This means “One hundred point two degrees.” 102° This means “One hundred and two degrees.”
Be sure to read it carefully. There is a big difference between 100.2° and 102°.
Turn on the thermometer.
Put some lubricating (LOO-bruh-kay-ting) jelly on the small end to help it slide in. KY Jelly, Surgilube, and Vaseline are brands of lubricating jelly.
Lay your child across your lap or on something firm, face up or face down.
Put one hand on your child's back if the child is face down.
If the child is face up, bend your child's legs to his or her chest. Rest your free hand against the backs of the thighs. This will help your child hold still.
Gently put the small end of the thermometer in your child's bottom where poop comes out (rectum). Put it in 1/2-inch deep.
Cup your hand over your child's bottom. Then hold the thermometer between the base of 2 fingers so it doesn't slip out.
Take it out after a minute or so, or when it signals that it is done. It may beep, stop flashing, or light up. Read the number.
Turn on the thermometer.
Put the small end of the thermometer under your child's tongue. Put it as far back as you can without hurting your child.
Have your child close his or her lips around the thermometer. Hold it there.
Put the small end of the thermometer in your child's armpit.
Hold your child's arm tightly against his or her side. With your other hand, hold the thermometer in place.
Ways to Take Temperature
Newborn to 3 months old
In child's bottom (rectal)
3 months to 3 years old
In child's bottom (rectal) or under child's arm (axillary)*
4 to 5 years old
In child's mouth (oral) or bottom (rectal) or under child's arm (axillary)*
Older than 5 years
*Taking your child's temperature in the mouth or bottom gives a better reading than taking it under the arm.
Wash the small end of the thermometer before and after using it. Use soap and cool water, not hot.
Label the thermometer “oral” or “rectal.” Don't use the same thermometer in both places. (You can use both kinds under the arm.)
If your child has had a hot or cold drink, wait 15 minutes before taking your child's temperature by mouth.
If you have questions about other kinds of thermometers, like ear or temporal (tem-PUR-ul) artery thermometers, ask your child's doctor.
Remember: A fever is anything over 100.4°F or 38°C.
The information contained in these topics is not intended nor implied to be a substitute for professional medical advice, it is provided for educational purposes only. You assume full responsibility for how you choose to use this information.
Always seek the advice of your physician or other qualified healthcare provider before starting any new treatment or discontinuing an existing treatment. Talk with your healthcare provider about any questions you may have regarding a medical condition. Nothing contained in these topics is intended to be used for medical diagnosis or treatment.
If you think that you are having a medical emergency,
call 911 or the number for the local emergency ambulance service NOW!
And when in doubt, call your doctor NOW
or go to the closest emergency department.
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