The reason why cancer patients suffer from cancer is that their body environment has a “cancerous constitution”. Surgery, radiotherapy and chemotherapy have killed the cancer cells, but the cell differentiation and regulation mechanism of the patient’s body has not changed. The cancer will recur and metastasize. Low immunity: The cells in normal human body keep metabolizing day and night, and among the new cells formed every day, about millions of cells will undergo genetic mutation, and if a few mutated cells are not restrained by the immune system, they will further malign and form tumor cells. Under normal circumstances, the immune system of the body is always monitoring and destroying these mutated and malignant cells or cancer cells in time, once abnormalities are found, a large number of immune cells will be mobilized to destroy the “foreign molecules”, making it difficult to form a climate. If a person’s immune surveillance function is normal, he or she will be able to snipe carcinogens and cancer cells outside the body and destroy them in the bud. Chemotherapy is a method of cancer treatment. Chemotherapy drugs not only kill tumor cells but also normal cells, which reduces the immune function of the patient’s body. To stop cancer recurrence, it is necessary to improve immunity after treatment, rebuild the body’s immune monitoring function and repair the body’s regulatory function. Unhealthy lifestyle: After a series of treatment, cancer patients return to life and work and start a new life. Some of them start to smoke, stay up late and drink alcohol again, which are not healthy lifestyles. And unhealthy lifestyle may be the root cause of cancer recurrence. All of these may be factors for cancer recurrence. Do colds easily make cancer recurrence? There is a saying that people who often catch colds are not prone to cancer, but some people say that when you catch a cold, your body is weak and germs are easy to invade, which may make cancer recurrence, in fact, these sayings are not true, colds do not make cancer recurrence, most of the cancer recurrence is because the body constitution has not changed, let’s see below, what kind of colds may be cancer? Many people have been suffering from cold for more than a month, but they are still not well, so they do not know what is going on. In fact, it is very likely to be cancer. Why do you say so? Many people have a cold with some symptoms such as runny nose and coughing phlegm, but it is not good all the time. In fact, this may be a symptom of nasopharyngeal cancer. Because the initial symptoms of nasopharyngeal cancer are not obvious, it is difficult to detect early. When it causes nasal congestion or affects vision because of lymphatic swelling, most of them have already developed to middle or late stage. Coughing for a long time is alert to lung cancer: Many people have a cough when they have a cold, and the cough is not good all the time, do you know what is the reason? In fact, this may be a signal of lung cancer. When many people find coughing up sputum with blood, or go to hospital for examination due to chest pain or difficulty in swallowing, most of them are already in advanced stage of lung cancer. If people have the experience of smoking and coughing for a long time, they should go to the hospital. Inexplicable headache and vomiting may be a sign of intracranial tumor: Many people will have headache and vomiting when they have a cold, and at first they think it is a normal cold symptom. However, inexplicable headaches and vomiting usually occur at night, and are more obvious in the forehead and back of the head. Be careful that it is a sign of intracranial tumor. Experts remind that if the above symptoms appear when blood pressure, sleep and other aspects are normal, it is necessary to be alert.