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There are several different types of thermometers on the market. Each one has positives and negatives; the best type depends on your child's age and your personal preferences.
Rectal Thermometer: The American Academy of Pediatrics (AAP) suggests a rectal thermometer for children three years old or younger. That’s because rectal thermometers provide the most accurate reading for young kids.
Oral Thermometer: Once your child is 4 or 5 years old, they can handle oral thermometers. Make sure they keep their mouth closed when the thermometer is placed under their tongue; they also shouldn't drink hot or cold liquids for 15 to 20 minutes before the reading.
Tympanic (Ear) Thermometer: These provide quick results—in just a few seconds—and generally keeps kids relaxed and comfortable. However, there are a few drawbacks: tympanic thermometers are more expensive than oral or rectal thermometers, and readings can be thrown off by earwax buildup or improper technique.
Temporal (Forehead) Thermometer: You can choose a temporal scanner if your little one doesn't tolerate other types of thermometers. They're fast and fairly accurate.
The Best Thermometers for Kids