Smoking cessation has a greater impact on blood pressure and is recommended for patients with hypertension. After quitting smoking patients’ peripheral resistance of blood vessels, elasticity of arterial walls, and blood viscosity will improve, and blood pressure will be relatively stable. Normal people have a smooth intima, but the nicotine and tar components in cigarettes will lead to the gradual formation of atherosclerotic plaques in the intima, causing vascular sclerosis, decreased vascular elasticity, and increased brittleness, resulting in higher blood pressure. Over time there will be a rupture of the plaque bleeding, resulting in luminal narrowing, increased resistance to blood flow will also increase blood pressure. The nicotine and tar in cigarettes also increase the viscosity of the blood, which increases the resistance to blood flow and can further lead to increased blood pressure. Therefore, quitting smoking will have a benign effect on blood pressure.