Control stress: Stop smoking

First of all, nicotine consumption increases blood pressure.
Secondly, it damages blood vessels. Here's how;
Atherosclerosis is a process in which fat and cholesterol form 'plaques' and stick to the walls of an artery. These plaques reduce the blood flow through the artery. Nicotine and other toxic substances from tobacco smoke are absorbed through the lungs into the blood stream and are circulated throughout the body. These substances damage the blood vessel walls, which allow plaques to form at a faster rate than they would in a non-smoker.
Last but not least, smoking can lead to peptic ulcer disease. Mucous production in the stomach is inhibited by cigarette smoke, increasing acid exposure of the esophagus and stomach, while limiting neutralizing base production. This results into peptic ulcers.