How to Say “I Have a Fever” in Japanese

熱がある
netsu ga aru
To say "I have a fever" in Japanese, you use 熱がある (netsu ga aru).
In Japanese, the subject "I" (watashi) is often omitted when it is clear from the context that you are talking about yourself.
Meaning: I have a fever (phrase)

What does it mean word for word?

The phrase literally means "heat exists", where 熱 (netsu) means heat/fever and ある (aru) means to exist/have.

How does it change in a sentence?

To express that you had a fever in the past, change the verb to the past tense form 熱があった.

How do you pronounce it?

netsu ga aru

Did you know?

  • In Japanese, the word 熱 (netsu) is used to describe both a medical fever and the passion a person feels for a hobby or interest, such as being 'feverish' about a specific topic.
  • When checking for a fever, Japanese pharmacies often sell 'cooling sheets' for the forehead called 冷却シート (reikyaku shiito), which are a ubiquitous cultural staple for managing high temperatures.
  • Japanese has a specific term 微熱 (binetsu) to describe a 'slight fever' or low-grade temperature, a distinction used frequently in daily conversation and medical reports.

Examples in context

Example conversation

Yota feels unwell at home and tells Misaki.

  1. 陽太 Yota

    熱がある。
    Netsu ga aru.
    I have a fever.
  2. 美咲 Misaki

    大丈夫?熱は何度くらい?
    Daijoubu? Netsu wa nando kurai?
    Are you okay? About how high is your fever?
  3. 陽太 Yota

    三十八度ある。
    Sanjuu-hachido aru.
    It is 38 degrees.
  4. 美咲 Misaki

    少し休んだほうがいいよ。
    Sukoshi yasunda hou ga ii yo.
    You should get some rest.

Sources

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Evie Isabelle
Evie IsabelleHelp make this guide better. Spot a mistake, know another way to say it, or have an example from real life? Share it below.
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