Patients with a sudden increase in blood pressure at night: 1. Consider cardiogenic diseases, such as patients with coronary artery disease, unstable angina, or acute myocarditis, all of which can lead to an increased load on the heart and therefore trigger a rise in blood pressure. For these diseases, once the patient develops severe heart failure, there will also be a sudden increase in blood pressure at night.2. If the patient develops obvious respiratory diseases, especially in respiratory infections, the infection leads to fever, and the fever will trigger a sudden increase in blood pressure at night.3. If the patient has previous endocrine and metabolic diseases, in hyperthyroidism, hyperadrenalism will also have 4. If the patient has frequent plant nerve dysfunction, the clinical symptoms of sudden increase in blood pressure may occur at night when rest and sleep are poor.