Drinking a small amount of coffee will not affect blood pressure. Hypertension is a group of syndromes with elevated arterial pressure as the main clinical manifestation. The main causes of hypertension are genetic and environmental factors, followed by the habits of the patient’s life and diet, which can also cause an increase in blood pressure. Although some studies have found that a certain amount of caffeine intake can raise blood pressure, coffee drinks do not, suggesting that caffeine still has a potential effect on blood pressure. There are also some patients who have sleep disruptions, stay up late or drink coffee or tea substances that affect sleep, and some patients who have respiratory sleep apnea syndrome, all of which can affect the rise in blood pressure of patients. So when patients drink too much coffee, on the one hand, more caffeine intake, in addition will lead to sleep disorders and cause an increase in blood pressure.