How to Check Fever with Digital Thermometer for Baby

Digital Thermometer for Baby

When a child is small, his body is so sensitive that it is difficult to tell when & how body temperature behaves. If you notice early signs of fever in a baby, it is important to measure the baby’s body temperature quickly & accurately. Always have a digital thermometer to check your child’s temperature Use.

Mercury thermometers should not be used. AAP Parents from home to avoid possible accidents from mercury Advise to remove mercury thermometers. Temperature setting other methods available for such as pacifier thermometer or although fever strips are available, they are not currently usable. You have to decide based on how much the thermometer shows the baby’s fever, whether you take the baby to the doctor or not.

Baby body temperature table






Under 5 years old

36.6°C – 38°C

(97.9°F – 100.4°F)

38.1°C (100.5°F) or higher


Children 2 years & up

35.8°C – 38°C

(96.4°F – 100.4°F)

38.1°C (100.5°F) or higher


Children 5 years & up

35.5°C – 37.5°C

(95.9°F – 99.5°F)

37.6°C (99.6°F) or higher


Children of any age

36.5°C – 37.5°C

(97.8°F – 99.5°F)

37.6°C (99.6°F) or higher

What is the baby’s body temperature called ‘high’?

Normally, if the baby’s facial temperature is 36.4 degrees Celsius or 98.5 degrees Fahrenheit, it is considered normal baby’s body temperature. But if the baby’s rectal temperature is 36 degrees Celsius or 100.4 degrees Fahrenheit, it is most likely a sign of fever. Understand, it’s time to take the baby to his doctor.

How to Check Fever with a Digital Thermometer for Baby

The correct temperature can be determined very quickly with a digital thermometer, so it is best to use a digital thermometer to know the condition of the child’s fever. If you are going to use a thermometer for the first time, be sure to read the ‘User Manual’ on the thermometer packet first and then use it, there will be written how to use this meter.

If you measure your child’s fever after bathing, you are more likely to not get the right temperature. It is important to put the baby in a comfortable place for a while and then use the thermometer. Different types of digital thermometers have different construction processes, so the process of using them is also different.

What type of thermometer is used to determine a baby’s body temperature?

Previously, the baby’s temperature had to be determined with an analog thermometer. But now there are different types of digital thermometers available in the market, through which the body temperature can be easily & accurately determined.

  • Multi-use digital thermometer – This thermometer is fitted with a metal strip and heat sensor with a small LCD screen. This digital thermometer accurately displays the baby’s body temperature in decimal points on the screen. The multi-use thermometer can be used to measure the temperature in the baby’s mouth, anus and under the armpits.
  • Tympanic digital thermometer- This specialized thermometer helps to determine the temperature inside the ear. The temperature of the ear is determined by the infrared heat wave emitted from the eardrum.
  • Temporal artery digital thermometer – This thermometer measures the baby’s body temperature by measuring the infrared heat wave emitted from the artery next to the baby’s forehead. This specially made thermometer is easily placed on the baby’s forehead to quickly determine the body temperature.

How to measure the baby’s facial temperature?

If the child is more than four years old, he should be given a mouth thermometer only when he has acquired the ability and intelligence to hold the thermometer inside his mouth on his own. If you are using a standard digital thermometer, you will need to use separate thermometers for anal and oral use.

One thing to keep in mind, however, is that when the baby’s body temperature is measured, at least 30 minutes before the baby should not be fed anything too cold or too hot; it is likely to lead to incorrect results.

Use a mouth thermometer to measure your baby’s body temperature in the following ways:

  • Rinse the thermometer with alcohol or disinfectant as usual and place it under the baby’s tongue and ask him to keep his mouth shut. One thing to keep in mind, of course, is that the baby holds the thermometer, not the teeth, but the lips.
  • Even if the child is able to hold the thermometer in his mouth alone, put the thermometer in his mouth, but do not leave him alone in the room.
  • Hold the thermometer in your mouth for three minutes, and then note the temperature it will show.
  • Once the temperature is measured, sterilize it again and keep it in a safe place.

How do I determine the temperature of the baby’s anus?

It is possible to know the exact temperature of the baby’s body by determining the temperature of the anus until the child is three years old. In addition, if the child cannot use an oral thermometer after the age of three due to a cough or nasal congestion, an anal thermometer can also be used.

Here’s how to measure anal temperature with a digital thermometer:

  • Dip a cotton ball in alcohol or Dettol and disinfect the thermometer first. Apply petroleum jelly to the part of the thermometer that will be inserted into the baby’s anus so that the baby does not feel uncomfortable.
  • Lay the baby on his stomach and tell the one you have to hold the baby gently. You can also put the baby upside down on his back, in which case ask him to keep his legs up.
  • The thermometer is inserted half an inch into the baby’s anus. However, if the baby is more than six months old, it can be 1 inch. Before entering, you can mark on the thermometer how much you will enter.
  • Hold the thermometer in the anus for at least 2 minutes until the thermometer signals or displays the temperature on the LCD screen.
  • Slowly bring out the thermometer and refill with Dettol or alcohol again.

The temperature of the anus is 0.5 degrees higher than the temperature of the baby’s mouth

Fahrenheit (0.3 centigrade) to 1.0 degrees Fahrenheit (0.8 centigrade) can be higher. If the temperature of the baby’s anus is more than 100.4 degrees Fahrenheit, that is, 36 degrees centigrade, it should be understood that the baby has a fever.

How do I diagnose a baby’s ear temperature?

A tympanic thermometer works quite well to find out the temperature of a six-month-old baby’s ear piercings in children less than six months of age are much smaller, so a tympanic thermometer should not be used at this age. It is important to place the thermometer in the ear properly to get the right temperature. If there is too much dirt in the baby’s ears, there is a possibility of showing the wrong temperature.

Get the right temperature for baby’s ears:

  • Insert the specific part of the thermometer into the ear. How much to insert is marked on the thermometer, just enter.
  • Each thermometer takes one time to measure the correct temperature. So read the user manual before use, keep it there as long as you are asked to keep it.
  • Since measuring temperature with this thermometer is a very sensitive task, measure several times to get the right temperature without measuring once.

Ear temperatures can range from 0.5 degrees Fahrenheit (0.3 centigrade) to 1.0 degrees Fahrenheit (0.7 centigrade) higher than mouth temperature. Therefore, if the temperature is 100.4 degrees Fahrenheit, that is, 36 degrees centigrade, then the child has a fever.

Determining the temperature of the baby’s armpits

This thermometer can be used at any age of the child but the thermometer for armpit use is less reliable than other thermometers. It is best not to use this thermometer in children under three months of age because in many cases it does not show accurate results.

To know the temperature of the baby’s armpits:

  • Take off the first baby’s clothes and put him on your lap.
  • If the baby’s armpits are wet, wipe well. Purify the tip of the thermometer with alcohol or Dettol.
  • Raise the baby’s hand a little and place the tip of the thermometer in the middle of the armpit and gently hold the hand again.
  • Hold until the beep sounds or the temperature appears on the screen.
  • Disinfect again before leaving the thermometer.

The armpit temperature may range from 0.5 degrees Fahrenheit (0.3 centigrade) to 1.0 degrees Fahrenheit (0.8 centigrade) lower than the baby’s mouth temperature. Therefore, if the temperature of the armpits is 99 degrees Fahrenheit (36.2 centigrade), then it should be understood that the child has a fever.

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