The cure rate and survival time of malignant tumor are closely related to the stage when the tumor is found. Early detection, early diagnosis and early treatment are what people have been expecting, and they are also the eternal theme advocated by medical practitioners at home and abroad. However, most of the patients are already in the middle and late stages once they are diagnosed, so how can tumors be detected at an early stage? (1) Regular physical examination is an important means to detect tumor at early stage: a comprehensive physical examination should be conducted once a year, and the examination items generally include lung X-ray, digestive system ultrasound, gastrointestinal fluoroscopy or gastroscopy, tumor marker detection, etc. Women should also check breast, cervical and gynecological ultrasound, and men should check prostate ultrasound, etc. Especially for patients with cirrhosis after hepatitis B, liver ultrasound should be done once every six months. (2) Early signals of malignant tumors need high vigilance: some tumors will show some non-specific signs and special symptoms in early stage, which are often ignored or misdiagnosed by people, the following are some early signals of common tumors, if found they should find a specialist for further examination as soon as possible. 1.Lung cancer: male breast development, joint pain, acanthosis nigricans, paroxysmal facial flushing, peripheral neuritis, muscle weakness syndrome, pestle and mortar finger (thick finger ends), blood in sputum, chest pain, choking and coughing. 2. Hepatocellular carcinoma: hypoglycemia, hyperglycemia, hypercholesterolemia, altered sex characteristics, hypertrophic osteoarthropathy. Indigestion. 3.Esophageal cancer: foreign body sensation in esophagus, unfavorable swallowing of food, tingling sensation behind the sternum when eating irritating food. 4.Colorectal cancer: change in bowel habits (increased number of bowel movements, thin stool, alternating between thin stool and constipation). 5.Nasopharyngeal cancer: foreign body sensation in the throat and blood in the snot. 6.Cervical cancer: change of leucorrhea (obvious odor, high volume), contact bleeding, polymyositis. 7.Breast cancer: painless breast lump with unclear border, sinking and swelling on the back of one shoulder, high blood calcium. 8.Kidney cancer: increased red blood cells, fever. 9.Pancreatic cancer: pain in the back, thrombocytosis. 10.Lymphoma: herpes zoster, fever, night sweats, itchy skin.