A person can get two and more cancers at the same time, but this is not common. Getting two cancers at the same time generally includes two situations: The first situation is the occurrence of two or more cancers in the same system before and after, for example, a case in which the patient was found rectal cancer by gastroenteroscopy in the physical examination of the unit, and the pathology showed adenocarcinoma, and chemotherapy was performed after the operation, and then an unexplained mass was found in the CT of liver, and the biopsy of fine needle aspiration revealed that it was the hepatic metastasis of rectal cancer, which is the secondary malignant tumor of the liver. Another situation is that two cancers with no clear connection and different systems occur at the same time, for example, a patient with bladder cancer is combined with nasopharyngeal carcinoma at the same time. Regardless of which situation they belong to, clinically, the two cancers will be dealt with separately through various auxiliary examinations and appropriate treatments according to the patient’s physical condition. It is recommended to keep an optimistic mindset, adopt a healthy lifestyle in daily life, and go to the hospital for regular medical checkups for early detection and early treatment.