Stretch marks are long, narrow streaks, stripes or lines that develop on the skin and which differ in hue from the surrounding skin. They are the result of a sudden stretching of the skin and are extremely common. Anyone can develop stretch marks, although they tend to affect more women than men.
Prinzmetal's angina is a form of unstable angina, meaning it usually occurs at rest, between the hours of midnight and early morning, and there's no predictable pattern to bouts of pain. (This is in contrast to stable angina, which is predictable pain caused by exercise or exertion.)
1 Variant angina, also called Prinzmetal's angina, is caused by a spasm in a coronary artery in which the artery temporarily narrows. 2  This narrowing reduces blood flow to your heart, causing chest pain. 3  Variant angina can occur even when you're at rest, and is often severe.he most common cause of reduced blood flow to your heart muscle is coronary artery disease (CAD). Your heart (coronary) arteries can become narrowed by deposits called plaques. This is called atherosclerosis.