熱を冷まさないといけません。 Netsu o smasanai to ikemasen. You need to lower your temperature. #Japanese for being sick. #LearnJapanese #JapaneseVocabulary #Languages. https://thelanguagegarage.com/japanse-vocabulary-for-illness/
Japanese Vocabulary for Illness

Learn essential Japanese vocabulary for illness and feeling sick, from coughs and congestion to headaches, fevers, and more.

The Language Garage