Pituitary microadenoma of 3mm is not the most serious case and does not require urgent treatment, but it should be taken seriously. Pituitary microadenoma is a form of intracranial tumor, whether it is 1mm or 10cm, which can affect the normal metabolic process of the body. Try to clarify the appropriate detection at an early stage and apply the appropriate medication and surgical treatment early. The diagnosis should be clarified before any treatment. If it is a prolactin type of pituitary microadenoma, it can be temporarily treated with oral bromocriptine. In the case of other types, 3mm can be temporarily observed, unless it increases rapidly at a later stage and is removed surgically, which can treat it from the most fundamental level.