The Hebrew noun charchur (חַרְחוּר) refers to a burning fever or extreme heat/inflammation. It appears in Deuteronomy 28:22 as one of the covenant curses threatened against Israel for disobedience — God would strike them with charchur, a burning fever, as a sign of covenant judgment. The word intensifies the root charar (to burn), suggesting a severe, consuming fire-like heat.
The covenant curses of Deuteronomy 28 are not random punishments but covenant consequences — the breaking of the covenant with God results in the unraveling of blessing in every sphere of life, including health. Charchur (burning fever) belongs to a list that includes drought, blight, sword, madness, and confusion — all expressing that life apart from God's covering is life exposed to chaos. The other side of this same coin is Exodus 15:26 — 'I am the LORD your healer' (Yahweh Rophekha). God who can strike with fever is the same God who promises healing to those who walk in His covenant. The theology of charchur drives the believer to depend fully on God for health and protection.