Hypertension is a common cardiovascular disease, mostly seen in middle-aged and elderly people. There are many factors that cause hypertension, including genetics, lifestyle and environment, medications and some diseases. Obesity is one of the factors that cause hypertension, and obesity causes hypertension is not simply overweight, but the result of a combination of factors. Compared with people of normal weight, the total amount of blood in the body of obese people is usually higher and the body is larger, resulting in higher pressure on the blood circulation system than that of people of normal weight. In order to maintain normal blood circulation in obese people, the heart needs to increase its power, so that the volume of blood discharged into the blood vessels per minute increases. However, this is also an important cause of high blood pressure. Also, obese people eat more, causing their blood insulin levels to be higher as well, creating insulinemia. This condition stimulates sympathetic nerve function, causing blood vessels to constrict, increasing peripheral resistance to blood vessels and causing blood pressure to become high. Insulinemia also causes increased sodium recovery by the kidneys, which also leads to higher blood pressure. In addition, obese people because the body fat content is too much, plus the amount of exercise is low, so also easy to suffer from diabetes and atherosclerosis and other diseases, these diseases will make the situation of hypertension more serious. And obesity will also lead to the low age of hypertension. Many obese children already have blood pressure fluctuations, and their probability of developing hypertension later is much higher than that of non-obese people, and they are also the main group of people with low age of hypertension. There are many ways to control hypertension. In addition to the often used medication control method, hypertension caused by obesity can be well controlled by weight loss, which is why weight loss surgery can treat hypertension. This is why bariatric surgery can treat hypertension. While losing body fat, bariatric surgery also greatly improves the metabolic environment of the patient’s body, resulting in a reduction of free body fat and a return to normal levels of many indicators, which naturally brings blood pressure under control.