미열 (miyeol) means “slight fever” | MotiTan Korean Dictionary

More examples

회복 중인데도 미열이 자꾸 올라요.hoe bok chung in de do mi yeo ri cha kku ol la yo

Even though I am recovering, my slight fever keeps rising.

A small rise in body temperature that is noticeable but not strong enough to count as a high fever.

열yeol: A body temperature above normal that indicates a fever.
열감yeolgam: A personal feeling that the body is hot.

정상 체온보다 약간 높은 가벼운 열 상태를 이르는 말.cheong sang che on bo da yak kkan no peun ka byeo un yeol sang tae reul i reu neun mal

This Sino-Korean compound joins the elements meaning small and heat to express a small amount of fever.

미열 (miyeol, "slight fever") focuses on body temperature, so details such as duration and other symptoms make a health report more useful.