Angina is chest pain or discomfort that occurs when your heart muscle does not get enough blood for a short period.
It may feel like pressure or a squeezing pain in your chest. The pain may also occur in your shoulders, arms, neck, jaw, or back.
In some cases, this condition is treated with medicines such as nitrates (nitroglycerin). People with angina may need to take other medicines to lower their blood pressure or cholesterol. They also may take medicine to prevent blood clots.
(Click Angina for a more detailed description of this condition, including how it is diagnosed, the different types, and what causes the lack of blood flow to the heart muscle.)