Most of the malignant tumors may show suspicious signs at the early stage. Combined with our specific situation, the following ten warning signs can be summarized: 1. A palpable, non-fading lump with a tendency to grow gradually is found on the skin, breast, tongue or any part of the body. 2. Significant changes in warts or moles. 3. Persistent indigestion. 4. Discomfort in swallowing, abnormal sensation, slight pain or choking in the esophagus behind the sternum. 5. Tinnitus, hearing loss, nasal congestion, nosebleeds, sometimes dizziness, headache. 6. Vaginal bleeding outside the menstrual period or after menopause. 7. Persistent dry cough, blood in the sputum and hoarseness. 8. Change in bowel and urine habits. 9. Wounds or ulcers that do not heal for a long time. 10. Unexplained weight loss. If the above symptoms appear, you should go to a regular hospital to consult a professional physician as soon as possible. Proper prevention, early diagnosis and reasonable treatment of malignant tumors are the guarantee of health.