As a language expert, I am not a medical professional, but I can provide you with some general information about angina. It's important to consult with a healthcare provider for a proper diagnosis and treatment. Angina is a type of chest pain that occurs when the heart muscle doesn't get enough blood and oxygen. There are two main types: stable and unstable angina. Stable angina is predictable and typically occurs with physical exertion or emotional stress. The pain is usually described as a feeling of pressure, tightness, or discomfort in the chest. It usually goes away with rest. Unstable angina, on the other hand, is a more serious condition. It can occur without any exertion or activity and is often described as sudden and worsening over a short period of time. It may also occur more frequently or with less activity than before. If you suspect you have unstable angina, it's crucial to seek immediate medical attention, as it can be a sign of an impending heart attack. read more >>

With stable angina, the chest pain or other symptoms only occur with a certain amount of activity or stress. The pain does not occur more often or get worse over time. Unstable angina is chest pain that is sudden and often gets worse over a short period of time.read more >>