Slightly thickened left adrenal gland medially with high blood pressure may be caused by abnormal hormone secretion within the adrenal gland. During the ultrasound examination of kidneys, sometimes the left adrenal gland will be slightly enlarged, which may be the manifestation of adrenal cortex hyperplasia or tumor formation, which will have certain influence on the secretion of aldosterone and other hormones regulating the blood pressure, and then lead to the elevation of blood pressure. When this happens, you need to pay attention to proper rest and actively monitor the changes of blood pressure, you can follow the doctor’s instructions to take drugs such as enalapril to control blood pressure, and if necessary, you also need to timely surgical resection of diseased tissues, in order to make the blood pressure slowly return to normal. If you find that the left adrenal gland is slightly enlarged with high blood pressure, you need to consult a doctor for appropriate examination and take effective treatment measures in time to prevent the condition from aggravating in the later stage.