noun
keeping the head cool and feet warm
A traditional health principle, often cited in the context of sleep or general well-being, that one should keep the head cool and the feet warm.
頭寒足熱は健康の基本と言われている。
It is said that keeping the head cool and feet warm is the foundation of good health.
A yojijukugo composed of 頭 (head), 寒 (cold), 足 (foot), and 熱 (heat). The exact origin is uncertain, but it reflects a traditional East Asian health concept.