Carcinoma is mainly a malignant tumor of epithelial tissue origin, and is one of the malignant tumors that are more common in clinical practice. For example, squamous cell carcinoma often occurs in the skin, cervix, vagina, esophagus, and other areas. Basal cell carcinoma often occurs in the face, eyelids, nose, cheeks and other parts of the elderly. Migratory cell carcinoma, which mainly occurs in the bladder, renal pelvis, etc., is also called uroepithelial carcinoma. Adenocarcinoma occurs mainly in the digestive tract, such as the stomach and intestines. The rest have some rare and special types of cancer, whose development is commonly caused by genetic factors, physicochemical factors, the body’s immune system, and hormone levels, which usually result from the interaction of multiple causes. Therefore, cancer is a kind of malignant tumor and patients are advised to detect and treat it early. Early cancer treatment is more effective and has a higher survival rate, and it can even be cured, so it is important to follow up closely and check the body regularly to avoid delaying the disease.