The main risk factor for angina is coronary heart disease (also called coronary artery disease or just CAD), and the main cause of heart disease is the thickening and hardening of the inside walls of arteries. This is called atherosclerosis. Some hardening of the arteries occurs normally as you grow older, but certain risk factors can increase the rate at which atherosclerosis develops.
While certain risk factors for coronary heart disease cannot be changed, it is important to realize that you do have control over many others.