How to take body temperature when having a fever

Generally, fever refers to an elevated body temperature and can usually be measured at sites such as the armpit, mouth, rectum, forehead, or ear. Specific details are as follows:

1. Armpit

The armpit is a commonly used site for measuring fever. By placing the tip of a mercury thermometer in close contact with the skin of the armpit and waiting quietly for 5–10 minutes, the body's internal temperature can be determined. A normal armpit temperature ranges from 36°C to 37°C; readings above this range typically indicate the presence of fever.

2. Mouth

Some people prefer oral temperature measurement. Oral temperature is generally slightly higher than armpit temperature. A reading exceeding 37.2°C usually indicates fever.

3. Rectum

Rectal temperature measurement is less commonly used and is generally reserved for uncooperative patients or very young children. A rectal temperature above 37.7°C is generally considered feverish.

4. Forehead

Forehead measurement is a non-contact method suitable for infants and young children. Using an infrared thermometer, aim it at the forehead, press the measurement button, and hold steady to obtain the temperature reading. A temperature above 37.3°C is typically considered indicative of fever.

5. Ear

Ear temperature is measured using an infrared ear thermometer inserted into the ear canal. Insert the thermometer into the ear, ensuring the ear canal is open and properly aligned toward the eardrum, then trigger the measurement and wait for the result. A temperature exceeding 37.5°C is generally considered fever.

In addition, when fever occurs, medication may be used under a doctor’s guidance, such as Ganmao Qingre Granules (Cold and Flu Relief Granules) or Amoxicillin Capsules. It is also important to drink plenty of water to accelerate metabolism and support recovery.