When a person has a fever, the temperature of the body exceeds the normal range, which may cause harm to the body. Therefore, measures must be taken to lower the body temperature. Physical cooling is achieved by physical means, and the following are ten ways to lower the body temperature physically when a person has a fever:

1. Ice: Use an ice pack or ice cubes wrapped in a towel and place it on the forehead, the back of the neck, or under the armpits, etc. to lower the body's temperature.

2. Cold water immersion: immersing your feet in cold water can bring down the temperature of your body.

3. Alternate hot and cold soak: Putting your feet in hot water and then in cold water and repeating it a few times can promote blood circulation in your body and help it cool down.

4. Cool bathing: Bathing in cool water can bring down the surface temperature of the body.

5. Ice cream: consuming ice cream can help to lower the temperature of the body.

6. air conditioning: using air conditioner to regulate the temperature of the room can bring down the temperature of the body.

7. Drinking cool water: Drinking cool water can help to cool down the body temperature.

8. Fans: Using fans can help the body cool down by allowing air to flow and promoting heat dissipation from the body.

9. Humidity regulator: Using a humidity regulator can regulate the humidity in the room, promote heat dissipation and help the body cool down.

10. Peppermint oil: Soaking a towel in peppermint oil and placing it on the forehead, back of the neck, or underarms, etc. can help the body cool down.

In general, when a person has a fever, the body temperature can be lowered by physical cooling methods. Commonly used methods include ice packs, cold water immersion, alternating hot and cold immersion, cool baths, ice cream, air-conditioning, drinking cool water, fans, humidity regulators, peppermint oil and so on. You can choose the right cooling method according to the specific situation to help your body cool down.