There is a cold and warm air can be solved, but there is a cold but deep into the physique. When it comes to cold constitution, the first thing to know is what is cold constitution, and to answer this question, we must also talk about the Yang Qi of people first. So, what is Yang Qi? Is Yang Qi important to the human body? In the Neijing, it is said that “Yang Qi is like the sky and the sun, and if it is lost, it is not manifest.” The meaning of this sentence is very clear: Yang Qi is like the sun in the sky, without the sun, everything would have no life. Without yang energy, people have no life! What is the relationship between cancer and the presence of cold in a person’s body? It is written in “The Five Changes” that “between the intestines and stomach, the cold and temperature are not in the same order, and when the evil qi arrives slightly, the accumulation stays. Jin – Liu Wansu “Suwen Xuanji original disease style” has: “all diseases up and down, the water out of the liquid, clear and cold, the obstruction decadent hernia, firm abdominal fullness, acute pain dysentery clear white …… all belong to the cold. These ancient discussions reflect a problem that the occurrence of cancer is related to cold constitution. The modern doctor Sun Bingyan’s summed up the analysis by observing 1000 cases of tumor patients and pointed out that “cold physique mostly suffers from phlegm and food stagnation or obstruction and accumulation”, and “most people with cold physique get tumor”. We often see such cases in the clinic, especially after chemotherapy and in the middle and late stage patients, who always show fear of cold limbs, shortness of breath and panting, fatigue, little breath and lazy speech, white face, swelling, clear and long urine, loose stools, sunken and late pulse, etc., or water and gas disease, or malignant effusion. These are all typical cases of Yang deficiency and cold victory. So, how do we know our yang status? In fact, besides some symptoms, such as easy cold hands and feet, diarrhea, indigestion, etc., the easiest way is to look at the tongue. Most people with cold Yang deficiency will show it on the tongue, mainly in the form of a pale tongue, a fat tongue or gingiva, and a convenient and easy way to check is to look at it yourself in the mirror. From the analysis of the study, if you want to avoid cancer, it is very important to protect your yang energy. Of course, since the occurrence of cancer is related to Yang deficiency and cold condensation, it is necessary to warm up Yang when treating it. Warming Yang not only treats Yang deficiency, but also enhances the function of internal organs, promotes the operation of Qi and blood, and the metabolism of fluids. Another research says that “using the power of warmth to kill cancer cells”, which is also very reasonable and has many similarities with the views of TCM. According to a modern doctor’s controlled study, Yang deficiency is the key to the deficiency of lung cancer, and is directly related to the production and development of the evil reality. Modern experimental research proves that the use of physical heating therapy, with a temperature of 43℃ acting directly on the local area, can rapidly kill cancer cells. The author has also achieved better efficacy in clinical treatment of brain tumor by using the method of warming the kidney and removing blood stasis and dispersing nodules. If you have a cold constitution, you should pay more attention in your life and consciously protect and enhance your yang energy to prevent the attack of evil toxins.