Tumors usually occur over a long period of time. If it can be detected early, diagnosed early, diagnosed early and treated early, satisfactory results can be achieved. The early manifestations of tumor are introduced below to draw people’s attention to tumor. 1. Appearance of lumps: The appearance of palpable lumps or hard changes in any part of the body, especially in the neck, breast, tongue and abdomen, should be highly alert to the possibility of tumor. 2.Mole or wart mutation: If a mole or wart has obvious changes within a short period of time, such as rapid increase in size, color deepening, hair loss, ulceration, bleeding and fluid flow, etc., you should be alert to the possibility of malignant change. 3.Uncured ulcers: If ulcers on the skin or mucous membrane (tongue, mouth) do not heal after a long time of treatment, one should be alert to the possibility of cancer. 4.Nasal congestion, nasal bleeding, tinnitus and headache: Adults with unilateral nasal congestion, nasal discharge with blood, especially nasal discharge with blood from the mouth by aspiration, tinnitus, unexplained headache on one side or double vision should be highly alert to the possibility of nasopharyngeal cancer. 5.Sustained hoarseness: Longer duration of sustained hoarseness should alert the possibility of laryngeal cancer or lung cancer. 6.Cough and blood in sputum: dry cough, unexplained blood in sputum, which does not improve after treatment or unexplained arthritis, should be alert to the possibility of lung cancer. 7.Insensibility of swallowing: there is a feeling of obstruction when swallowing food, especially when swallowing each mouth, it is obvious that there is stuffiness and discomfort behind the sternum, burning pain, foreign body feeling in the esophagus or epigastric pain. If these symptoms are worsening day by day, you should be highly alert to the possibility of esophageal cancer. 8.Abdominal pain, food reduction and abnormal digestion: If there is unexplained loss of appetite, epigastric distention and pain or bloating or persistent abnormal digestion after eating well in general, one should be alert to the possibility of stomach cancer. 9.Pain under the right rib cage: If you have a history of hepatitis or alcoholism, and recently find discomfort in the liver area or pain under the right rib cage, you should be alert to the possibility of liver cancer. 10.Blood in the stool, cramping, deformation of stool: blood in the stool without obvious reasons (not hemorrhoids, anal fissure, etc.), or alternating diarrhea and constipation, or deformation and thinning of stool, should be alert to the possibility of rectal cancer. 11. Painless hematuria and dyspareunia: blood in urine is found when urinating, but there is no pain; elderly men with dyspareunia and difficulty in urination, frequent urination and thinning of urine stream should be alert to the possibility of kidney, bladder and prostate cancer. 12.Headache and vomiting: If you have persistent headache, headache mostly in the morning or evening, headache intensifies when sneezing, coughing or defecating, vomiting and not related to eating, or busy bias, or change of smell and taste, unstable walking, etc., you should be alert to the possibility of brain tumor. 13.Loss of weight and fever: Progressive loss of weight for unknown reasons or fever for a longer period of time should be alerted to nausea lymphoma, liver cancer, etc. When all the above-mentioned manifestations appear, neither early wood should be taken lightly, but timely medical consultation should be made. Early diagnosis depends on the vigilance of doctors. In non-oncology hospitals, once a patient is found to be suspicious, he or she should seek discussion with oncology specialists and conduct necessary examinations to confirm the diagnosis in time.