In the early stage of cancer, there will be more or less various physical discomforts, and if you pay more attention, you will find the traces. Experts remind that if the following symptoms appear, you should pay attention to them and go to hospital for examination as early as possible. I. Sputum blood: Patients suffering from lung cancer, due to tumor growth in the bronchial wall, destroy small blood vessels and cause sputum blood. Sputum blood is often an important signal of lung cancer. Pain: Patients suffering from chronic gastritis or ulcer, pain becomes irregular. Pain often comes on after meals with a feeling of fullness, which is a signal of chronic gastritis or ulcer; patients suffering from duodenal ulcer often have pain when they are hungry, and when the pain becomes irregular or persistent, it should be taken seriously. Go to hospital for examination to see if there is anything new. Stomach cancer often makes the pain become irregular with black stool. Third, vague pain or distension in the right upper abdomen: the first symptom of liver cancer is often feeling distension in the right upper abdomen. Imaging examination can determine the presence of liver cancer when there is no symptom. Progressive dysphagia: dysphagia means poor swallowing, which is obvious when eating dry food and often has to eat with water; then dry food is not swallowed and it has to eat thin and soft food. This is often a signal of esophageal cancer and should be examined by barium swallowing or microscopy in hospital. V. Blood in nose or lump in neck: having blood in nose in the morning or finding a lump below behind the ear is a signal of nasopharyngeal cancer. Nasopharyngeal cancer can also cause nasal congestion and tinnitus, while neck lumps are caused by lymph node metastasis in the neck.? Abdominal pain, bloating and blood in stool: Any middle-aged or elderly person who feels abdominal pain or blood in stool, or alternating constipation and diarrhea, should consider the possibility of colon cancer. Long-term unexplained fever: Leukemia and lymphoma often have fever, and at the same time, symptoms such as anemia and emaciation may appear. Abnormalities can be found in blood tests for leukemia, and swollen lymph nodes in the neck or armpit can be seen in lymphoma. Breast lumps: Women over 40 years of age should frequently check their breasts for lumps and whether their nipples are overflowing with fluid or blood. If there is any abnormality, mammography should be done for early detection of breast cancer. 9. Headache, vomiting or eye swelling pain: It is often a danger signal of intracranial tumor. This kind of headache is not related to eating and eye swelling pain is not related to vision loss. Yellow eyes or yellow skin all over the body: It can be a signal of bile duct cancer or pancreatic head cancer. The jaundice is caused by the obstruction of bile ducts by tumor and the accumulation of bile.