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| Meta Title | Fever treatment: Quick guide to treating a fever - Mayo Clinic |
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| Boilerpipe Text | A fever is a common sign of illness. But that doesn't always mean it's a bad thing. In fact, fevers may help fight infections. So should you treat a fever or let the fever run its course? Here's help knowing what to do.
These suggestions are for people who don't have serious health issues. That means they don't have a suppressed immune system, aren't taking chemotherapy medicines and haven't recently had surgery.
Listed in the table below are temperatures taken with rectal and oral thermometers. These thermometers give the best measure of core body temperature.
Other types of thermometers include ear thermometers, called tympanic membrane thermometers, and forehead thermometers, called temporal artery thermometers. They're easy to use, but they don't measure temperature as well.
Infants and toddlers
Age
Temperature
What to do
0-3 months
100.4 F (38 C) or higher taken rectally
Call your child's healthcare professional, even if your child doesn't have other symptoms.
3-6 months
Up to 102 F (38.9 C) taken rectally
Have your child rest and drink fluids. Your child doesn't need medicine. Call your child's healthcare professional if your child seems more cranky than usual, has little energy or isn't comfortable.
3-6 months
Above 102 F (38.9 C) taken rectally
Call your child's healthcare professional, who may suggest that you bring your child in for an exam.
6-24 months
Above 102 F (38.9 C) taken rectally
Give your child acetaminophen (Tylenol, others). If your child is age 6 months or older, ibuprofen (Advil, Motrin, others) is OK too. Read the label to be sure to give the right dose. Don't wake your child to give fever medicine. Don't give aspirin to an infant or toddler. Acetaminophen and ibuprofen don't have aspirin in them. Call your child's healthcare professional if the fever doesn't respond to the medicine or lasts longer than one day.
Children
Age
Temperature
What to do
2-17 years
Up to 102 F (38.9 C) taken rectally for children ages 2-3, or taken orally for children older than 3
Have your child rest and drink fluids. Your child doesn't need medicine. Call your child's healthcare professional if your child seems very cranky, has little energy or complains of great discomfort.
2-17 years
Above 102 F (38.9 C) taken rectally for children ages
For discomfort, give your child acetaminophen (Tylenol, others) or ibuprofen (Advil, Motrin, others). Read the label to be sure to give the right dose. Be careful not to give your child more than one medicine that has acetaminophen, such as some cough and cold medicines. Don't give aspirin to children or teenagers. Don't wake your child to give medicine for fever. Call your child's healthcare professional if the fever doesn't respond to the medicine or lasts longer than three days.
Adults
Age
Temperature
What to do
18 years and up
Up to 102 F (38.9 C) taken orally
Rest and drink fluids. You don't need medicine. Call your healthcare professional if there's also a bad headache, stiff neck, shortness of breath or other symptoms.
18 years and up
Above 102 F (38.9 C) taken orally
For discomfort, take acetaminophen (Tylenol, others), ibuprofen (Advil, Motrin IB, others) or aspirin. Read the label to be sure to take the right dose. Be careful not to take more than one medicine with acetaminophen, such as some cough and cold medicines. Call your healthcare professional if the fever doesn't respond to the medicine, stays at 103 F (39.4 C) or higher or lasts longer than three days. |
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1. [Home](https://www.mayoclinic.org/)
2. [Diseases and Conditions](https://www.mayoclinic.org/diseases-conditions)
3. [Fever](https://www.mayoclinic.org/diseases-conditions/fever/symptoms-causes/syc-20352759)
4. Fever treatment: Quick guide to treating a fever
# Fever treatment: Quick guide to treating a fever
[By Mayo Clinic Staff](https://www.mayoclinic.org/about-this-site/meet-our-medical-editors)
Feb. 04, 2025
A fever is a common sign of illness. But that doesn't always mean it's a bad thing. In fact, fevers may help fight infections. So should you treat a fever or let the fever run its course? Here's help knowing what to do.
These suggestions are for people who don't have serious health issues. That means they don't have a suppressed immune system, aren't taking chemotherapy medicines and haven't recently had surgery.
Listed in the table below are temperatures taken with rectal and oral thermometers. These thermometers give the best measure of core body temperature.
Other types of thermometers include ear thermometers, called tympanic membrane thermometers, and forehead thermometers, called temporal artery thermometers. They're easy to use, but they don't measure temperature as well.
| Age | Temperature | What to do |
|---|---|---|
| 0-3 months | 100\.4 F (38 C) or higher taken rectally | Call your child's healthcare professional, even if your child doesn't have other symptoms. |
| 3-6 months | Up to 102 F (38.9 C) taken rectally | Have your child rest and drink fluids. Your child doesn't need medicine. Call your child's healthcare professional if your child seems more cranky than usual, has little energy or isn't comfortable. |
| 3-6 months | Above 102 F (38.9 C) taken rectally | Call your child's healthcare professional, who may suggest that you bring your child in for an exam. |
| 6-24 months | Above 102 F (38.9 C) taken rectally | Give your child acetaminophen (Tylenol, others). If your child is age 6 months or older, ibuprofen (Advil, Motrin, others) is OK too. Read the label to be sure to give the right dose. Don't wake your child to give fever medicine. Don't give aspirin to an infant or toddler. Acetaminophen and ibuprofen don't have aspirin in them. Call your child's healthcare professional if the fever doesn't respond to the medicine or lasts longer than one day. |
| Age | Temperature | What to do |
|---|---|---|
| 2-17 years | Up to 102 F (38.9 C) taken rectally for children ages 2-3, or taken orally for children older than 3 | Have your child rest and drink fluids. Your child doesn't need medicine. Call your child's healthcare professional if your child seems very cranky, has little energy or complains of great discomfort. |
| 2-17 years | Above 102 F (38.9 C) taken rectally for children ages | For discomfort, give your child acetaminophen (Tylenol, others) or ibuprofen (Advil, Motrin, others). Read the label to be sure to give the right dose. Be careful not to give your child more than one medicine that has acetaminophen, such as some cough and cold medicines. Don't give aspirin to children or teenagers. Don't wake your child to give medicine for fever. Call your child's healthcare professional if the fever doesn't respond to the medicine or lasts longer than three days. |
| Age | Temperature | What to do |
|---|---|---|
| 18 years and up | Up to 102 F (38.9 C) taken orally | Rest and drink fluids. You don't need medicine. Call your healthcare professional if there's also a bad headache, stiff neck, shortness of breath or other symptoms. |
| 18 years and up | Above 102 F (38.9 C) taken orally | For discomfort, take acetaminophen (Tylenol, others), ibuprofen (Advil, Motrin IB, others) or aspirin. Read the label to be sure to take the right dose. Be careful not to take more than one medicine with acetaminophen, such as some cough and cold medicines. Call your healthcare professional if the fever doesn't respond to the medicine, stays at 103 F (39.4 C) or higher or lasts longer than three days. |
Show references
1. Kliegman RM, et al. Fever. In: Nelson Textbook of Pediatrics. 22nd ed. Elsevier; 2025. https://www.clinicalkey.com. Accessed Oct. 30, 2024.
2. AskMayoExpert. Infant fever (age 60 days or younger). Mayo Clinic; 2024.
3. Ward MA. Fever in infants and children: Pathophysiology and management. https://www.uptodate.com/contents/search. Accessed Oct. 30, 2024.
4. Fever. Merck Manual Professional Version. https://www.merckmanuals.com/professional/infectious-diseases/biology-of-infectious-disease/fever?query=fever%20in%20adults. Accessed Oct. 30, 2024.
5. Dinarello CA, et al. Pathophysiology and treatment of fever in adults. https://www.uptodate.com/contents/search. Accessed Oct. 30, 2024.
[Print](https://www.mayoclinic.org/diseases-conditions/fever/in-depth/fever/art-20050997?p=1)
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| Readable Markdown | A fever is a common sign of illness. But that doesn't always mean it's a bad thing. In fact, fevers may help fight infections. So should you treat a fever or let the fever run its course? Here's help knowing what to do.
These suggestions are for people who don't have serious health issues. That means they don't have a suppressed immune system, aren't taking chemotherapy medicines and haven't recently had surgery.
Listed in the table below are temperatures taken with rectal and oral thermometers. These thermometers give the best measure of core body temperature.
Other types of thermometers include ear thermometers, called tympanic membrane thermometers, and forehead thermometers, called temporal artery thermometers. They're easy to use, but they don't measure temperature as well.
| Age | Temperature | What to do |
|---|---|---|
| 0-3 months | 100\.4 F (38 C) or higher taken rectally | Call your child's healthcare professional, even if your child doesn't have other symptoms. |
| 3-6 months | Up to 102 F (38.9 C) taken rectally | Have your child rest and drink fluids. Your child doesn't need medicine. Call your child's healthcare professional if your child seems more cranky than usual, has little energy or isn't comfortable. |
| 3-6 months | Above 102 F (38.9 C) taken rectally | Call your child's healthcare professional, who may suggest that you bring your child in for an exam. |
| 6-24 months | Above 102 F (38.9 C) taken rectally | Give your child acetaminophen (Tylenol, others). If your child is age 6 months or older, ibuprofen (Advil, Motrin, others) is OK too. Read the label to be sure to give the right dose. Don't wake your child to give fever medicine. Don't give aspirin to an infant or toddler. Acetaminophen and ibuprofen don't have aspirin in them. Call your child's healthcare professional if the fever doesn't respond to the medicine or lasts longer than one day. |
| Age | Temperature | What to do |
|---|---|---|
| 2-17 years | Up to 102 F (38.9 C) taken rectally for children ages 2-3, or taken orally for children older than 3 | Have your child rest and drink fluids. Your child doesn't need medicine. Call your child's healthcare professional if your child seems very cranky, has little energy or complains of great discomfort. |
| 2-17 years | Above 102 F (38.9 C) taken rectally for children ages | For discomfort, give your child acetaminophen (Tylenol, others) or ibuprofen (Advil, Motrin, others). Read the label to be sure to give the right dose. Be careful not to give your child more than one medicine that has acetaminophen, such as some cough and cold medicines. Don't give aspirin to children or teenagers. Don't wake your child to give medicine for fever. Call your child's healthcare professional if the fever doesn't respond to the medicine or lasts longer than three days. |
| Age | Temperature | What to do |
|---|---|---|
| 18 years and up | Up to 102 F (38.9 C) taken orally | Rest and drink fluids. You don't need medicine. Call your healthcare professional if there's also a bad headache, stiff neck, shortness of breath or other symptoms. |
| 18 years and up | Above 102 F (38.9 C) taken orally | For discomfort, take acetaminophen (Tylenol, others), ibuprofen (Advil, Motrin IB, others) or aspirin. Read the label to be sure to take the right dose. Be careful not to take more than one medicine with acetaminophen, such as some cough and cold medicines. Call your healthcare professional if the fever doesn't respond to the medicine, stays at 103 F (39.4 C) or higher or lasts longer than three days. | |
| Shard | 40 (laksa) |
| Root Hash | 1608882045018104440 |
| Unparsed URL | org,mayoclinic!www,/diseases-conditions/fever/in-depth/fever/art-20050997 s443 |