Chinese medicine thinking process is very complex, induction, deduction, reasoning, analogies and analogies will be used. Today I talk about reverse thinking. What is reverse thinking, that is to say, against the patient’s complaints thinking. Let’s say, the patient complained of fatigue, you must first think of this patient is not necessarily a gas deficiency. Because from the perspective of traditional Chinese medicine, weakness can have several pathologies. For example, if the spleen is trapped by dampness, the patient will feel lazy and weak. For example, if the liver qi is depressed, the patient may feel fatigued. This is all part of the evil qi stagnation of yang qi, so that the yang qi can not be transmitted and thus weakness, but not qi deficiency. For example, if a patient complains of coldness, you must first consider whether the patient is really cold or not, because in some cases, although the patient feels cold, it is not a deficiency of yang. I have encountered a patient, nasopharyngeal cancer radiotherapy, radiotherapy department, please find my consultation, the patient complained of cold limbs, and impotence. According to common sense, this kind of cold limbs and impotence should be attributed to Yang deficiency in Chinese medicine, but when I looked at the patient for the first time (diagnostic examination), I found that the patient’s face was dark, but with luster, and it was not the sallow face usually described as the face of kidney deficiency. Then I touched the pulse and felt that the patient’s skin was firm to the touch, not the kind of loose skin of a patient with yang deficiency. Then feel the pulse, the pulse said solid but not solid, said false but not false, although not a flood pulse, but the sinking press is not a weak pulse. It is my custom to feel the pulse first and then verify it by questioning. At that time, I felt the patient’s pulse and thought for a long time, according to the patient’s complaints to identify Yang deficiency and prescribe medication, but I always feel that the patient is not a patient with Yang deficiency from the pulse and the situation of diagnosis. But when I asked the patient if he had any other pains, he said that this was all he had, and there were no other symptoms. I thought for a long time, just when I was suffering from uncertainty, I suddenly had a flash of light in my head and came up with a way to identify the patient. So I asked the patient, “If you feel cold, do you feel cold only in your limbs or in your body? The patient said that only the limbs feel cold, in fact, the chest and back feel hot. This complaint made me realize. I immediately realized that the patient’s cold limbs were not due to a deficiency of yang qi, but rather the patient’s yang qi was being stifled. So I gave the patient a prescription with the addition and subtraction of Si Reverse San (to open up the Yang qi that was being held back), and after seven doses of the medicine, the patient reported that the cold limbs had improved. After seven doses of the medicine, the patient said that the coldness of the limbs had improved, and even the impotence was improved. Later, the patient ate 14 consecutively, the patient’s symptoms completely relieved. Through this case, we can see that reverse thinking is a very important way of thinking in Chinese medicine, which can often guide you to take the right path of treatment. In addition, doctors should be the most patient, especially Chinese medicine doctors, because the wrong direction of treatment may lie in the doctor’s momentary negligence.