Some hormones accelerate tumor growth, but hormones can be used to treat tumors. Some hormones accelerate tumor growth, such as growth hormone, which is a protein hormone secreted by eosinophils in the anterior lobe of the pituitary gland, and can stimulate the development of all body tissues and increase the number and size of body cells. The use of growth hormone for too long in tumor patients may accelerate tumor cell growth and promote tumor cell mitosis. However, hormones may also be used in clinical treatment of tumors, for example, growth hormone can improve the body metabolism of patients with malignant tumors, and can also improve the patient’s tolerance to surgery, radiotherapy, etc.. Therefore, hormones have both good and bad effects on tumors. It is recommended not to use hormones blindly, and the application of hormones in tumor patients should be evaluated by professional doctors.