Editor's note: I have heard of hypertension and hypotension, but do you know that elderly people are prone to hypotension after meals? What's going on here? How to prevent postprandial hypotension? Dad Zhang is 65 years old this year. He is usually in good health. Recently, he is always dizzy after meals. He went to the hospital, and the doctor said it was postprandial hypotension. What's going on here? Postprandial hypotension refers to a significant decrease in postprandial systolic blood pressure, that is, a decrease of 20mmHg in postprandial systolic blood pressure within 2 hours (some studies now believe that a decrease of 30mmHg in postprandial systolic blood pressure can be regarded as postprandial hypotension); Or pre-meal systolic blood pressure "100mmHg", while post-meal systolic blood pressure