In clinical practice, some misconceptions and misunderstandings are often found to be popular among cancer patients and their families, and it is necessary to explain and correct them: 1. “You can’t take chemotherapy for cancer, and if you take chemotherapy, you will collapse faster and die faster”. In fact, as early as in the 1980s, doctors conducted thousands of clinical studies to discuss whether chemotherapy or nutritional support therapy can bring more benefits to cancer patients, and concluded that effective chemotherapy + nutritional support therapy is more effective than nutritional support therapy alone, and that the survival period of patients is longer, and the quality of life of patients is also higher. That is to say, it is absolutely impossible to treat cancer solely by “supporting the right”, and it is necessary to implement “evil” treatment at the same time. Of course, most chemotherapeutic drugs are “double-edged swords” that kill tumors and normal cells, and if they are not used properly, they will make people “collapse and die quickly”. Therefore, it is no exaggeration to say that chemotherapy is an art, when you need to cure the tumor, you should give it a “fierce pursuit”, and when you need to maintain your strength, you should keep “fine rain and wind”, and you can only balance and stabilize the organism if you don’t have one of the two. A good medical oncologist is bound to be an artist who can grasp the balance and walk the “tightrope” well, so as to maintain the patient’s own immunity and make the best use of chemotherapeutic drugs to maximize their therapeutic effects and minimize the toxic side effects. 2, “in order to increase immunity, chemotherapy is to eat more during the period, can not eat when you have to eat strong”. As mentioned earlier, chemotherapy drugs cause digestive reactions, one of the important reasons is to damage the mucosa of the gastrointestinal tract, resulting in edema and “refuse to accept” food. This is actually an organism on the gastrointestinal epidermal cells “self-protection” reflex, if forced to eat, they will not “rest”, and even aggravate the damage. Therefore, the diet should be as mentioned above, small meals, chewing and swallowing slowly, first thin and then dry, step by step, the principle should be summarized as “eat when you can eat, eat as much as you can eat”. 3. “In order to strengthen one’s own resistance, it is necessary to strengthen exercise and restore physical strength during chemotherapy”. In fact, the strength of one’s own resistance depends more on the usual exercise and physical fitness, after chemotherapy is precisely the weakest period of the immune system, you should “save energy, accumulate positive energy”, excessive physical exertion will only delay the recovery, and also pay attention to the prevention of wind and cold when you breathe fresh air outdoors. Therefore, physical exercise should be gradual according to their specific conditions, and should not be rushed. In conclusion, chemotherapy is a science, but also an art, a doctor and patient hand in hand, pay attention to the strategy and tactics, and the art of dancing with cancer. The more cancer patients and their family members know about it, the more they will have a bottom in their hearts, the more active they will be in cooperating with the treatment, and the better the result will be. Therefore, a good medical oncologist is inevitably a good artist, a good communication expert and a good missionary teacher.