发热
HSK 7-9to have fever; to heat up; to emit heat
Explanation
feverish; unable to think calmly; to emit heat
Examples
发热了,得赶紧去看医生。
He has a fever, he must see a doctor immediately.
他最近总是发热,可能是感冒了。
He's been having fevers lately, he might have a cold.