A small pituitary gland is not usually hereditary. The pituitary gland is located in the center of the base of the brain and can secrete a variety of hormones, and is the body’s secretion organ. The pituitary gland is small in size, but the hormones secreted can maintain normal physiological functions, if the secretion is insufficient, it will bring various effects. Small pituitary gland is usually caused by congenital development, the pituitary function is normal, usually do not need to be treated, and generally will not be hereditary; acquired factors such as autoimmune disease, hemorrhage, insufficient blood supply, etc., can also lead to pituitary gland is small, but generally will not be hereditary. It is recommended to improve the function of the pituitary gland and clarify the situation under the guidance of the doctor.