Internal heat

1. Heat signs due to excessive wear on yīn humor, such as tidal heat, night heat effusion, vexing heat in the five hearts, night heat effusion, vexation and thirst, dry bound stool, short voidings of reddish urine, red tongue with scant fur, and a fine rapid pulse. Plain Questions (素问 sù wèn, tiáo jīng lùn) states, When yīn is vacuous, there is internal heat.

2. Evil heat entering the interior, characterized by red face and eyes, heart vexation, heat effusion, thirst with a liking for cold drinks, constipation, short voidings of reddish urine, red tongue with dry yellow tongue fur, and a rapid sunken pulse. In severe cases, there is clouded spirit and delirious raving.

See internal evil.