Definition A collective term for a variety of malignant tumors. Their cells grow and divide faster than normal cells and can often metastasize to other tissues. The body can destroy cancer cells through immune system suppression, but when the body’s ability to prevent cancer is weakened or suppressed, cancer cells will continue to proliferate and form clinically visible cancers. Adverse environmental aggressions are buffered or resisted by the body’s protective system, and their effects can be eliminated or diminished. When the cancer-causing factors are too strong or the cumulative effect is too great, and the body has insufficient immune function or deficient body repair function, cancer may occur. In fact, some cancer cells exist in each of us in varying numbers, but only a very small number of cancer cells can develop into cancer, and most of them are either removed by the body in time or have no ability to divide on their own and remain latent for a long time without harming human health. Early detection of cancer Almost all cancers will be cured if detected early and given proper treatment! Therefore, early detection is very important! If you find the following symptoms, you should go to the hospital for examination: (1) Unexplained weight loss, weakness, irregular pain in the upper abdomen, loss of appetite, especially aversion to meat foods. (2) In non-pregnant and breastfeeding women, there is nipple water or the ability to squeeze out fluid. (3) Gradually increasing masses in any part of the body such as the breast, neck or abdomen. (4)Dry cough, blood in the sputum, chest pain with chest tightness for a long time. (5) In women of middle age or older, there is a small amount of vaginal bleeding after sexual intercourse, or there is usually irregular vaginal bleeding, or menstruation comes back after several years of menopause, and the leucorrhea increases significantly. (6) Gradually deepening jaundice and epigastric masses without abdominal pain. (7) Rapid enlargement of the liver with pain in the liver area. (8) Painless hematuria of unknown origin. (9) Skin ulcers that do not heal for a long time. (10) Sudden enlargement of the mole, accompanied by burning, itching, breaking, painful bleeding or loss of hair on the mole. (11) Recurrent fever and persistent dental bleeding, subcutaneous bleeding and progressive anemia. (12) Recurrent unexplained high fever. (13) White spots on the oral mucosa, or on the female vulva or male penis glans, which rapidly enlarge and burn with discomfort. (14) Progressive weakness of both lower extremities, abnormal sensation, movement disorder or incontinence of urine and stool. (15) Fracture of large bones such as femur and humerus without obvious external force. (16) Foreign body obstruction or tingling sensation behind the sternum when eating and swallowing or slow passage of food. (17) Nasal congestion, frequent small amount of nasal bleeding or blood in the nose, accompanied by migraine, dizziness, tinnitus and enlarged lymph nodes felt in the upper part of the neck below the earlobe in the anterior and posterior areas. (18) Change in bowel habits, or frequent alternation of diarrhea and constipation, or stools often with pus and blood, or thinning and flattening of stools. (19) Gradually increasing headache with sudden onset of transient visual disturbance and vomiting. (20) Severe pain and swelling of the elbow or knee joint in adolescents, ineffective treatment with anti-rheumatic drugs or antimicrobial agents, etc. Treatment Includes surgery, radiotherapy and medication. Surgical treatment is divided into radical surgery, palliative surgery and exploratory surgery; radiotherapy can be divided into in vitro and in vivo, with the former applying X-ray therapy machines, cobalt 60 therapy machines or neutron gas pedals for treatment, and the latter applying radionuclides for treatment; drug therapy is divided into traditional Chinese medicine and western medicine for treatment. Each treatment has its own strengths and shortcomings, and should be chosen according to the condition and physical condition, and usually be used in conjunction with each other.