Early detection and diagnosis of malignant tumor is the key to improve the cure rate and treatment prognosis. The following ten symptoms and eight signs are the warning signs that should draw people’s attention to cancer: Ten symptoms: 1. Lumps in any part of the body, such as breast, neck or abdomen, especially those that gradually increase in size. 2. Ulcers on any part of the body, such as tongue, cheek mucosa, skin, etc. without trauma, especially those that do not heal for a long time. 3.Irregular vaginal bleeding or discharge (commonly known as increased leucorrhea) in women of middle age or older. 4.Dullness, burning pain, foreign body sensation or progressive aggravation of dysphagia behind the sternum when eating. 5.A dry cough or blood in the talk that cannot be cured for a long time. 6.Long-term indigestion, progressive loss of appetite, wasting, and no clear cause is identified. 7.Change in stool habit or blood in stool. 8.Nasal congestion, epistaxis, unilateral headache or diplopia. 9.A sudden increase in size of the nevus or breakage, bleeding, or loss of the original hair. 10. Painless hematuria. Eight signs: 1. Unilateral persistently worsening headache, vomiting and visual disturbance, especially diplopia of unknown origin. 2.Tinnitus, hearing loss, retractable sputum with blood, and neck mass. 3.Unexplained oral bleeding, oropharyngeal discomfort, foreign body sensation or cavity pain. 4, Painless and persistent worsening jaundice. 5, Nipple overflow, especially bloody fluid. 6.Growing gynecomastia. 7.Unexplained fatigue, anemia and fever. 8.Unexplained generalized pain, bone and joint pain. In addition, precancerous lesions should also be considered as early signs. For example, mucosal leukoplakia, chronic skin ulcers, fistula, proliferative scars (especially scars caused by chemical burns), atrophic gastritis and intestinal epithelial hyperplasia, multiple polyps in the rectum, skin keratosis (especially keratosis of the palm at the size of the fissure, cystic lobular hyperplasia of the breast, cervical erosion, cervical polyps, etc.) can develop into cancer.