If your body reveals the above signs, you should seek medical consultation immediately to find out the truth. We must remember that for malignant tumors, early detection, early diagnosis and early treatment are the best strategies to prevent and control cancer. Thirteen danger signs of common cancers: 1. palpable or non-dissipating lumps on breast, skin, tongue or other parts of the body: breast cancer, skin cancer, tongue cancer, thyroid cancer, etc.; 2. obvious changes in warts or moles (such as deepening color, enlargement, itching, hair loss, oozing, ulceration, bleeding): possible malignant melanoma; 3. persistent indigestion: associated with stomach cancer and intestinal cancer; 4. Choking sensation, pain, foreign body sensation or epigastric pain when swallowing food: possible esophageal cancer; 5. Tinnitus, hearing loss, nasal congestion, epistaxis, blood in nasopharyngeal secretions from aspiration and coughing, headache, neck mass: nasopharyngeal cancer, with higher incidence in Guangdong and Guangxi; 6. Abnormal heavy bleeding during menstruation, irregular vaginal bleeding outside menstruation or after menopause, bleeding after sexual contact: cervical cancer and uterine body cancer; 7. Persistent hoarseness Dry cough with blood in sputum: laryngeal cancer, etc.; 8. Unexplained blood and mucus in stool, diarrhea, alternating constipation, hematuria: colorectal cancer, etc.; 9. Long-standing wounds and ulcers: skin cancer, etc.; 10. Irritating cough with long-lasting cough or bloody sputum. This kind of cough is often considered as an early sign of lung cancer. 11.Unexplained weight loss for a longer period of time: cancers of various parts of the body, such as pancreatic cancer, primary liver cancer, stomach cancer, etc. are common. 12.Headache and vomiting. Headache, etc. occur mostly in the morning or evening. Vomiting is not related to eating. It should be regarded as a danger signal of intracranial tumor. 13.Long-term unexplained fever. Signals of malignant lymphoma, leukemia and other malignant tumors.