Easily nervous may heart bad, may cause coronary artery spasm, increased cardiac load and other adverse effects. 1. Coronary artery spasm: when nervousness sympathetic nerve tone increases, myocardial contractility increases, heart rate increases, it will make myocardial oxygen consumption increases. At this time the oxygen supply may not be able to meet the needs of the heart muscle, there may be coronary artery ischemia, spasm, there may be chest, tightness, panic, dizziness, and even pain in the precordial area. 2. Increased cardiac load: Tension may also cause disorders of the neurohumoral endocrine system, and there will be an increase in cardiac afterload. Generally speaking, nervousness does not lead to serious organic damage to the heart, in daily life, we should be calm and active in dealing with things.