Angina is not a disease as such. Angina happens as a result of ischemia, when one or more of the coronary arteries is narrowed or blocked.
It is a symptom of an underlying heart problem, typically coronary artery disease (CAD) or coronary microvascular disease (MVD, which is more likely to affect women than men.) CAD involves plaque formation in the coronary arteries, which can narrow the blood vessels and block blood flow to the heart muscle. MVD occurs when there is damage to the inner walls of the coronary artery blood vessels, which can lead to spasms and decreased blood flow to the heart muscle, even if there is no plaque build-up.
High blood pressure and prolonged angina are conditions that may persist for a long time, so it is necessary to take the medicine daily. Do not stop taking the medication without consulting your doctor.