Small nodules are found in the left adrenal gland, and it is important to clarify the function of the nodule as well as the size of the nodule. Adrenal lesions or nodules can be found in the adrenal cortex and adrenal medulla, and are commonly associated with adrenal adenomas, adrenal hyperplasia, and pheochromocytomas. Generally speaking, adrenal nodules are benign lesions. After finding a nodule, it is important to pay attention to the patient’s blood pressure, blood glucose and potassium level. Because of the location of the lesion, different hormones may be secreted, causing increased blood pressure, decreased blood potassium and steroidal diabetes. Therefore, a joint consultation and problem solving by endocrinologists and urologists is needed. If there is no functional change, dynamic observation can be done.