What causes high diastolic blood pressure?

High diastolic blood pressure may be caused by genetic factors or by regularly consuming large amounts of high-salt, high-calorie, and high-fat foods, which can impair vascular elasticity. It may also result from intense physical activity in a short period, leading to excessive sympathetic nervous system activation, increased cardiac output, and elevated pressure on the vessel walls. Additionally, conditions such as glomerulonephritis or chronic pyelonephritis can cause increased sodium and water retention in blood vessels, raising intravascular pressure and potentially leading to high diastolic blood pressure. Timely medical consultation is recommended for proper evaluation and differential diagnosis.