According to the characteristics of our country, the National Office of Cancer Control puts forward the top ten danger signs of common cancers in our country to alert people to be highly alert: 1. Palpable or non-dissipating lumps in breast, skin, tongue or other parts of the body. 2.Significant changes in warts or moles (e.g. deepening color, enlargement, itching, hair loss, oozing, ulceration, bleeding). 3.Persistent indigestion. 4.Choking sensation, pain, foreign body sensation or epigastric pain when swallowing food. 5.Tinnitus, hearing loss, nasal congestion, epistaxis, blood in nasopharyngeal secretions from aspiration and coughing, headache, neck lumps. 6.Unusual heavy bleeding during menstruation, irregular vaginal bleeding outside of menstruation or after menopause, contact bleeding. 7.Persistent hoarseness, dry cough, blood in sputum. 8.Unexplained blood and mucus in stool, alternating diarrhea and constipation, hematuria. 9.Long-term untreated wounds and ulcers. 10.Unexplained weight loss for a longer period of time.