Angina and fork in the road triggers, symptoms and so on there is a certain difference, usually need to pay attention to identify. 1. Causes: angina pectoris is a type of coronary artery disease, mainly due to the reduction of myocardial blood flow, so that myocardial hypoxia. The clinic will also be divided into stable angina, unstable angina and variant angina, generally stable angina is triggered by physical labor, unstable angina is no obvious cause, can also occur at rest. In the case of variant angina, it is caused by coronary artery spasm. Angina pectoris is pain in the chest and ribs during exercise, which is usually seen in pushing, jumping, climbing, carrying heavy objects, etc. It is mainly caused by insufficient or no preparatory activities. 2. Symptoms: Usually, angina patients often have episodic pain, which can be manifested as squeezing pain in the chest, mostly located in the back of the sternum, but can be radiated to the precordial area, jaw and throat, upper limbs, etc., and some patients may only manifest chest tightness. The attack may also be accompanied by nausea, sweating, palpitations, dyspnea and other symptoms. Forked air is mainly located in the right lower ribs, mostly manifested as chest tightness and pain, the pain area is large, and also in the case of coughing, deep breathing, turn the body, etc., the pain or pain in the chest. Some patients may also be accompanied by shortness of breath and other phenomena. It is recommended to distinguish between angina pectoris and angina, if angina pectoris occurs, it is also necessary to consult a doctor in a timely manner.