《黄帝内经·素问·六元正纪大论》
火运之气为暑热，其正常气化为火盛热郁，其反常变化为火炎沸腾，其致病为热郁于上，热甚迫血妄行则血溢、血泄，心痛。
少阳，太宫，厥阴。甲寅，甲申。其运阴雨，其化柔润重泽，其变震惊飘骤，其病体重、胕肿、痞饮。
The air of the fire movement is summer heat. Its normal qi is transformed into intense heat, and its abnormal change is the boiling fire. Its morbidity manifests as qi stagnation in the upper body, severe heat, forcing the blood to run wildly, which will lead to blood overflow, blood leakage, and heartache.