Tea may prevent the occurrence of cancer, some studies have found that tea contains theophyllinol, theophyllinol can reduce the occurrence of cancer, so often drink tea including green tea, black tea is good for the human body, can reduce the chance of many malignant tumors in the body. In addition to drinking tea to develop a good diet and lifestyle habits, if the body has cancer can not drink tea to fight cancer, drinking tea can not kill the tumors in the body, so tea mainly plays a preventive role. If a tumor has already appeared, anti-tumor treatment needs to be carried out according to the pathological type, location and clinical stage of the tumor.