《黄帝内经·素问·疟论》
疟邪不入于阴经，所以但热而不恶寒，这种病邪在内藏伏于心脏，而外泄则留连于肌肉之间，能使人肌肉瘦削，所以病名叫 瘅疟 。
其气不及于阴，故但热而不寒，气内藏于心，而外舍于分肉之间，令人消烁脱肉，故命曰瘅疟。
Malaria evil does not enter the yin meridian, so it is only hot and does not cause chills. This kind of evil is in the heart in the internal organs, and it is left between the muscles when it is released outside, which can make people's muscles thin, so it is called chills.