There is no best solution for high renin, which needs to be treated according to the cause. The causes of high renin may include emotional instability, massive blood loss, tumor, kidney-related diseases such as renal hypertension, renal artery stenosis and so on. 1. Emotional instability: when the patient is emotionally excited, it may increase the secretion of renin, which is accompanied by the increase of blood pressure. Patients should keep their emotions stable in daily life and avoid anxiety and tension. 2. Large amount of blood loss: If the patient suffers from hemorrhage due to trauma or other factors, it may also increase the level of renin in the organism with the purpose of providing blood to the organs in the organism. The patient should go to the hospital to stop bleeding in time to avoid adverse consequences. 3. Tumor: when the patient has adrenal pheochromocytoma, it will also increase the renin significantly, which can be removed using surgery. 4. Kidney disease: when kidney is damaged, the metabolism of water and sodium will be impaired, and the retention of sodium in the body will lead to the increase of blood pressure and the increase of renin; when the renal artery is narrowed, the increase of renin can also occur. Patients with high renin should be calm in daily life, eat a light diet, seek medical advice when abnormalities occur, identify the causes, and follow the doctor’s instructions for treatment.