Lymph nodes have the possibility of cancer, but it is less likely. Moreover, not all lymph nodules can become cancerous, but they should be analyzed objectively depending on the patient’s primary disease and the patient’s physical condition. If the patient’s health condition is poor and there is a combination of malignant tumor of thyroid, malignant tumor of pharynx and malignant tumor of esophagus, the lymph nodes in this case may become cancerous. Patients should have the primary tumor removed and lymph nodes cleared as soon as possible to prolong life as much as possible. If the patient is in good health and has swollen lymph nodes in the neck due to upper respiratory tract infection, the swollen lymph nodes can be absorbed on their own after the infection is actively controlled, and cancer will not occur in general. Whether lymph nodes will become cancerous or not is related to life and eating habits, so a balanced diet, regular work and rest time and exercise should be adhered to. If you are not feeling well, you should actively seek medical consultation and treatment in hospital.