Heat is treated with cold

From Plain Questions (素问 sù wèn, zhì zhēn yào dà lùn). Cold and cool medicinals are used for heat patterns. Heat patterns include exterior heat, internal heat, vacuity heat, and repletion heat. Exterior heat forming a repletion pattern is treated by resolving the exterior with coolness and acridity, while interior heat is treated by clearing. Vacuity heat is treated by enriching yīn to abate heat or by eliminating great heat with warmth and sweetness.