Tumors include benign tumors and malignant tumors. There are no exact top 10 precursors for tumor patients, most of them have no symptoms in the early stage, and even if symptoms appear in the early stage, they are not the same and not specific. Therefore, it is difficult to discover tumors by themselves through early symptoms, and they are often treated according to common diseases and miss the early treatment time. Therefore, it is recommended that people over 45 years old should routinely undergo annual physical examination, especially when non-specific manifestations such as fever, weakness, dizziness and poor mental health occur, they need to go to hospital for examination. In addition, when patients have the following unexplained symptoms, they should also promptly improve relevant examinations to clarify the specific causes. 1. bleeding: bleeding can take more diverse forms, which can be manifested in the form of hematuria, coughing up blood, blood in stool, nosebleeds, irregular vaginal bleeding, etc., which may be urological tumors, respiratory system tumors, digestive system tumors, etc.; 2. lumps: when a painful lump is palpated and the lump grows faster, such as neck, abdomen, breast, etc., it may be tumor, such as benign thyroid cyst, parotid cyst, as well as malignant lymphoma, thyroid cancer, breast cancer, etc.; 3. Difficulty in swallowing: when the patient shows the performance of swallowing, accompanied by the feeling of throat obstruction and discomfort behind the sternum, and the trend of progressive aggravation, it can be considered the appearance of tumor, such as esophageal cancer; 4. Cough: when the patient shows unexplained cough, coughing sputum, When patients have unexplained cough, sputum and wheezing, or in severe cases, coughing with blood and other respiratory symptoms, tumor can be considered, such as lung cancer and lung malformation tumor; 5.ulcer: when patients have skin cancer, the skin can be shown as ulcer-like breakage, and it occurs repeatedly and lasts for a long time, and general drug treatment is ineffective; 6.moles and warts change: unexplained moles or warts can appear on the body, and if there are changes in shape and color, cancer risk is considered. If there are changes in shape, color, etc., consider the risk of cancer, such as malignant melanoma; 7. Other symptoms: When there are unexplained symptoms such as hoarseness, pain, diarrhea, thin stools, abnormal leucorrhea, sharp weight loss, etc., they can also be caused by tumors. If you suspect that you are suffering from tumor, you need to choose the corresponding department for consultation according to your symptoms and the part of the body where it occurs. The precursors of tumors are often not obvious, and when obvious symptoms appear, the condition is usually more serious. Therefore, patients are advised to detect and treat early. The treatment rate is high after resection of early tumors, and patients in middle and late stages should cooperate with doctors to control the development of the disease, improve the quality of life and prolong the survival period.