The boy’s leg shaking has nothing to do with kidney deficiency. It is a habitual action that relaxes itself. There is not much harm. It can also help them promote blood flow, prevent embolism, and relieve tension and anxiety, but the effect is not good. When we look at people shaking their legs, we all think of a sentence, “Men shake poor, women shake cheap”. In daily life, the habit of shaking legs is often very unpleasant, but many people are unconsciously shaking their legs. Will a boy’s legs shake his kidneys? What are the hazards? From the perspective of traditional Chinese medicine, kidney belongs to water, liver belongs to wood, and aquatic wood. Therefore, if a person’s kidney essence is insufficient, liver essence must be affected. If the liver wind moves inside, people are prone to shaking. This theory seems very reasonable, but at present there is no medical research, any data shows that leg shaking is related to kidney deficiency. Therefore, there is no scientific basis for saying that leg shaking is kidney deficiency. Leg shaking behavior is similar to the symptoms of restless leg syndrome, but daily leg shaking is essentially different from this disease. Restless legs syndrome is a neurological disease, mainly related to abnormal dopamine metabolism and iron deficiency, and has certain genetic factors. Most of the leg-shaking behaviors in our daily life do not belong to the category of disease. It is more inclined to a habitual action to relax ourselves, which can be stopped immediately when reminded by others. When people concentrate on doing things, they generally don’t shake their legs. They usually happen when they are bored. This is an unconscious phenomenon. Some people like to shake their legs in stressful situations, which is also a trick to relieve tension and distract. It is not a disease and does not require treatment. There is not much harm. It can also help them promote blood flow, prevent embolism, and relieve tension and anxiety, but the impact is not good. Especially when attending formal occasions, shaking your legs will leave a bad impression.