The higher systolic pressure (high pressure) and lower diastolic pressure (low pressure) mainly reflect atherosclerosis of the heart’s blood vessels, especially the aorta. This atherosclerosis is characterized by increased brittleness and poor elasticity of blood vessels. After the heart shoots blood into the aorta, the aorta itself should play a normal regulating role in the process of contraction and diastole. However, due to atherosclerosis, the regulating effect of blood vessels becomes poor, causing large fluctuations in blood pressure, which eventually results in a high pressure and low pressure situation. If a patient finds that her blood pressure is low, she should have her blood pressure measured regularly, at regular intervals, in a fixed position, on different days and at different times, and if all of them find that the low pressure is less than 60 mmHg, then the patient is considered to be in the hypotensive group. It is important to determine if this group is young women, because some young women have low blood pressure due to weight loss and dieting. If this group is excluded, then pathological hypotension is considered. These people should eat more green vegetables and drink more high-calcium milk to prevent further brittleness of the arteries and progressive hardening of the arteries. It is also important to drink plenty of water to ensure the perfusion of blood in the body. Good blood perfusion facilitates the various organs to get enough oxygen and blood. However, in the case of coronary heart disease and heart failure, the amount of water as well as milk consumed needs to be strictly controlled. If too much food is consumed, it can also increase the burden on the heart and even lead to heart failure. Therefore a low pressure at one time does not mean anything by itself, and several measurements should be taken. If all of them reveal a low blood pressure, the patient is often considered to have severe atherosclerosis. This atherosclerosis needs to be retested by the patient to determine if there is a need to see a cardiologist for treatment. If the patient can be adjusted by dietary improvements alone, a visit is not necessary. If the patient is found to be ineffective through dietary and lifestyle improvements, the patient should seek the help and guidance of a cardiologist.