《黄帝内经·素问·痿论》
所以肺脏感受了热邪，灼伤津液，肺叶枯焦，就会皮肤干燥、汗毛焦枯，热邪不去就会发病为四肢痿软无力的 痿躄 ；心脏感受了热邪，可使下部的气血上逆，气血上逆就会引起肢体的血脉空虚，血脉空虚就会发病为 脉痿 ，使膝踝关节不能屈伸，小腿软弱不能站立行走；肝脏感受了热邪，可使胆汁外溢而口苦，筋膜失养而干枯，以至筋脉挛缩拘急，就会发病为 筋痿 ；脾脏感受了热邪，则灼耗胃中津液而口渴，肌肉失养而麻木不仁，就会发病为不知痛痒的 肉痿 ；肾脏感受了热邪，灼伤肾精，就会使髓减骨枯，腰脊不能举动，就会发病为 骨痿 。
故肺热叶焦，则皮毛虚弱，急薄，着则生痿躄也。心气热，则下脉厥而上，上则下脉虚，虚则生脉痿，枢折挈，胫纵，而不任地也。肝气热，则胆泄口苦，筋膜干，筋膜干则筋急而挛，发为筋痿。脾气热，则胃干而渴，肌肉不仁，发为肉痿。肾气热，则腰脊不举，骨枯而髓减，发为骨痿。
Therefore, if the lungs become infected with the heat pathogen, this will burn body fluids, causing the lung's leaves to become dry and scorched, which will lead to dry skin and burnt body hair; if the heat pathogen is not eliminated, limbs will become weak and powerless, causing amyotrophy; if the heart becomes infected with the heat pathogen, this will cause descending qi and blood to rise, and if qi and blood rise, the limbs' blood vessels will become empty, and if blood vessels are empty, the limbs will become atrophied, causing the knee and ankle joints to be unable to bend and stretch, and the lower leg will become weak, rendering standing and walking impossible; if the liver becomes infected with the heat pathogen, this will cause bile to flow out excessively, resulting in a bitter taste in the mouth, and malnutrition of the fascia, causing it to dry out and shrink, which in turn will cause the tendons and pulse to contract, resulting in atrophy; if the spleen becomes infected with the heat pathogen, this will burn away stomach fluids, causing thirst, and malnutrition of the muscles, causing numbness, resulting in atrophy where a person is unaware of pain or itching; if the kidney becomes infected with the heat pathogen, this will burn kidney essence, causing bone marrow loss and bone drying, and the waist and spine to become unable to move, resulting in bone atrophy.