There is no authoritative information on how much high prolactin is suspected to be a pituitary microadenoma, mainly because high prolactin is not necessarily a pituitary microadenoma, but may also be caused by hypothyroidism, hypoadrenalism and other diseases, but generally prolactin is less than 200 ng / ml, it is considered to be more likely to be microadenoma. Prolactin, also called prolactin, is a polypeptide hormone. Since, clinically, there are many causes of high prolactin, high prolactin is not necessarily caused by pituitary microadenoma, therefore, there is no relevant authoritative information on how much high prolactin is suspected to be pituitary microadenoma. However, usually, when the prolactin level is less than 200ng/ml, it is considered more likely to be a microadenoma. In addition to this disease, high prolactin can also be caused by hypothyroidism, hypoadrenalism and other diseases. To summarize, people with high prolactin need to undergo further relevant examinations to clarify the specific cause.