The prevention of pituitary tumor includes the following aspects: the first aspect is to make sure to strengthen exercise, to have a good physique, to get more sunlight, to eat more alkaline food, to maintain an alkaline physique, and to avoid too much acid in the body. The second aspect is the diet, avoiding spicy, cold, irritating food. The third aspect, lifestyle habits is to avoid smoking, alcohol, coffee and other excitatory diet. The fourth aspect is to maintain a good state of mind, especially in a stressful environment, to learn to resist stress.