1. The importance of understanding and grasping cancer alarm signals. At present, because of people’s low awareness of cancer prevention, many cancers are already in the middle or late stages of life once they are detected. In fact, most cancers have signals in their early stages. As long as we pay attention to these signals, we will be able to nip cancer in the bud. (2) Ten major warning signs summarized by the Chinese Anti-Cancer Society: (1) significant weight loss; (2) long-lasting ulcers; (3) lack of appetite and fullness in the epigastrium; (4) progressive dysphagia; (5) breast lumps and nipple overflow; (6) irregular vaginal bleeding; (7) enlarged lymph nodes; (8) blood in the stool, blood in the urine and haemoptysis; (9) persistent hoarseness; (10) a paroxysmal, irritating dry cough; and (11) a strong, dry cough in the nose, nose and throat. In addition, nasal congestion, epistaxis, unilateral headache or diplopia, sudden increase of nevus, ulceration, bleeding, loss of existing hairs, etc. should be taken seriously. 3, the Chinese Anti-Cancer Association also summarized the ten alarm signals of cancer into three very incisive concepts, namely: abnormal lumps, intestinal bleeding, weight loss. (1) Abnormal lumps: A hard, fixed, painless and itchy lump appeared in the place where there was none, i.e. abnormal lumps. Then, how to find this lump? The Chinese Anti-Cancer Society teaches us a very simple and easy method, namely: when taking a bath, after applying soap on the body, start from both sides of the neck, i.e., from the root of the ear all the way to the shoulder, then to the upper and lower part of the collarbone on both sides, then to the armpits on both sides, then to the chest and abdomen, and lastly to the root of the thighs on both sides. We believe that abdominal self-examination is best performed in the morning before waking up, because at this time the body is in a state of fasting, the abdomen is concave, and it is relatively easy to find deep masses. In other words, when you wake up in the morning, lie on your back and gently touch your abdomen with your hand. Regularly performing the above strokes, you may find abnormal masses deep in the abdominal cavity in time. It is very important for early detection of cancer. (2) Bleeding in the intestinal cavity: including the mouth, nasal cavity, urethra, vagina, anus, all the outwardly opening parts, as long as there is abnormal bleeding or frequent bleeding, it is likely to be a very important early alarm signal of cancer, and it should be given enough attention. You should pay attention to it and go to a tumor specialist hospital to have a relevant examination. (3) Weight loss: If you lose weight every week for no apparent reason, you should first consider cancer after excluding diabetes, tuberculosis and hyperthyroidism.