颤振，手足动摇，不能自主，乃肝之病，风之象，而脾受之也。肝应木，木主风，风为
阳，
阳主动；脾应土，土主四肢，四肢受气于脾者也。土气不足，而木气鼓之，故振之动摇，所
谓风淫末疾者是也。
按∶手足为诸阳之本，阳气不足，则四肢不能自主，而肝风得以侮之。肝应木，热生风
，阴血衰则热而风生焉。故犯此症者，高年气血两虚之人，往往有之，治之极难奏功。
《内经》曰∶暑胜则地热，风胜则地动，湿胜则地泥，寒胜则地裂。寒暑风湿之气，虽
本乎
天，而皆入乎地，而人之足履之，所以往往受其毒也。始从足起，渐及小腹，甚乃上攻心胸
，若不急治，遂至杀人，况五脏经络，脾与肝肾，皆从足指上走腹中，故香港脚之候，或呕吐
恶食，或腹痛不利，或二便闭塞不通，或胸中怔悸，不欲见明，或精神昏愦，错语善忘，或
头
疼壮热，或身体冷痛，时觉转筋，或少腹不仁，或髀腿顽痹，或百节挛急，或缓纵不随，症
状不一，以其自脚得之，故均谓之香港脚。而又有干湿之异。干香港脚之状，血脉痞涩，皮肤麻
痹，胫细酸疼，食减体瘦，脏腑秘滞，上冲烦闷。湿香港脚之状，脚先肿满，或下注生疮，浸
淫滋水，或上攻心腹，咳嗽喘急，面浮膝肿，见食呕吐，为病不同，盖阴阳体脏所分，其为
风毒湿气则一，要当随其病症所在而治之。
颤振，表现为手足动摇不定，无法自主控制，这是肝脏的疾病，属于风邪的表现，同时脾脏也受到了影响。肝对应五行中的木，木主生风，风属于阳，阳主动；脾对应五行中的土，土主四肢，四肢的气血来源于脾。如果脾气虚弱不足，而肝木之气鼓动它，就会导致震颤动摇，这就是所谓的“风淫末疾”（风邪侵袭四肢末端导致的疾病）。
按语：手足是诸阳经的根本，如果阳气不足，四肢就不能自主运动，肝风就会乘虚侵害。肝对应木，热极生风，阴血衰少则产生内热，进而化风。因此，患此症的人，往往是年老体弱、气血两虚之人，这种情况很常见，治疗起来很难取得显著效果。
《黄帝内经》说：“暑气胜则地面炎热，风气胜则大地震动，湿气胜则地面泥泞，寒气胜则大地开裂。”寒、暑、风、湿这些气候之气，虽然源于天，但都会侵入地中，人用脚踩踏地面，所以往往受到这些邪气的毒害。香港脚病开始从足部发起，逐渐波及小腹，严重时甚至向上攻冲心胸，如果不紧急治疗，会导致死亡。况且五脏经络中，脾、肝、肾的经脉都从足趾上行走进入腹中，所以香港脚的证候，有的出现呕吐、厌恶饮食，有的腹痛且排便不畅，有的大小便闭塞不通，有的心中惊恐悸动，不愿见光亮，有的精神昏沉混乱，胡言乱语且健忘，有的头痛高热，有的身体冷痛，时常感觉肌肉痉挛抽搐，有的小腹部感觉迟钝麻木，有的大腿和小腿顽固性麻痹，有的全身关节拘挛急迫，有的肢体松弛瘫软不能随意活动，症状多种多样，因为都是从脚部得病，所以统称为香港脚。其中又有干性和湿性的区别。干性香港脚的症状是：血脉阻滞涩滞，皮肤麻木不仁，小腿纤细酸痛，食欲减退身体消瘦，脏腑传导秘结停滞，气机上冲导致烦闷。湿性香港脚的症状是：双脚先肿胀满溢，或者向下流注形成疮疡，浸淫流出滋水，或者向上攻冲心腹，引起咳嗽气喘急促，面部浮肿膝盖肿胀，见到食物就呕吐。这两种病症不同，大概是由于阴阳体质和脏腑偏颇所分，但它们都是由于风毒湿气所致，关键在于要根据病症所在的具体情况进行治疗。
Tremor and shaking (Chanzhen), characterized by the involuntary trembling of the hands and feet, is a disease of the Liver (Gan), an image of Wind (Feng), which also affects the Spleen (Pi). The Liver corresponds to Wood (Mu); Wood governs Wind. Wind belongs to Yang (Yang), and Yang governs movement. The Spleen corresponds to Earth (Tu); Earth governs the four limbs, and the four limbs receive Qi from the Spleen. When Earth Qi is insufficient and Wood Qi agitates it, tremors and shaking occur. This is what is referred to as "Wind Yin Mo Ji" (diseases of the extremities caused by excessive Wind).
Note: The hands and feet are the root of all Yang meridians. When Yang Qi is insufficient, the four limbs cannot move autonomously, allowing Liver Wind to invade. The Liver corresponds to Wood; extreme heat generates Wind. When Yin Blood declines, internal heat arises, which in turn generates Wind. Therefore, those who suffer from this condition are often elderly individuals with deficiency of both Qi and Blood. It is common for such cases, but treatment is extremely difficult to achieve success.
The *Neijing* (Huangdi Neijing) states: "When Summerheat prevails, the earth becomes hot; when Wind prevails, the earth shakes; when Dampness prevails, the earth becomes muddy; when Cold prevails, the earth cracks." Although the Qi of Cold, Summerheat, Wind, and Dampness originates from Heaven, they all penetrate into the Earth. Since humans walk upon the ground, they often suffer from their toxicity. Hong Kong Jiao (Hongjiaojiao, commonly known as Beriberi or gouty arthritis in ancient contexts, here referring to a specific lower limb disorder) begins in the feet, gradually spreading to the lower abdomen, and in severe cases, attacks upward toward the heart and chest. If not treated urgently, it can be fatal. Moreover, the meridians of the Zang-Fu organs, specifically the Spleen, Liver, and Kidney, ascend from the toes into the abdomen. Thus, manifestations of Hong Kong Jiao may include vomiting and aversion to food, abdominal pain with difficulty in defecation, blockage of urination and defecation, palpitations and fright in the chest, aversion to light, mental confusion, delirium, and forgetfulness, headache with high fever, cold pain in the body, frequent muscle spasms, insensitivity in the lower abdomen, stubborn numbness in the thighs and calves, cramping and urgency in all joints, or flaccidity and inability to move freely. Symptoms vary widely. Since these ailments originate from the feet, they are collectively termed Hong Kong Jiao. There are further distinctions between Dry and Wet types.
Dry Hong Kong Jiao presents with obstructed and sluggish blood vessels, numbness and anesthesia of the skin, thin and sore calves, reduced appetite and emaciation, constipation and stagnation in the Zang-Fu organs, and upward rushing causing irritability and oppression. Wet Hong Kong Jiao presents with initial swelling and fullness of the feet, or sores forming below due to downward flow, oozing fluid, or upward attack on the heart and abdomen causing coughing and rapid breathing, facial edema, knee swelling, and vomiting upon seeing food. These diseases differ, likely due to divisions in Yin-Yang constitutions and organ involvement, but both are caused by Wind-Toxicity and Dampness. Treatment must be tailored according to the specific location and nature of the symptoms.