In usual cases, weight gain causes patients to develop increased low pressure. Usually, after weight gain, patients develop hyperlipidemia or insulin resistance or diabetes mellitus, which can cause increased peripheral resistance of blood vessels, decreased elasticity of arterial walls, and increased blood viscosity, which can aggravate the increased low pressure. Under normal circumstances, the inner lining of blood vessels in normal people is smooth and fluid, but after weight gain patients will gradually deposit atherosclerotic plaques under the inner lining of blood vessels due to increased blood lipids and increased blood viscosity, causing vascular sclerosis, and decreased elasticity will lead to increased blood pressure. Long-term narrowing of the lumen will also cause increased resistance to blood flow, which will also lead to an increase in blood pressure. When blood lipids increase, blood viscosity will also increase, and this situation will also lead to an increase in low pressure.