If the nervousness and rapid heartbeat are caused by physiological reasons, they can usually be controlled by themselves; if they are caused by pathological reasons, they need medical treatment. Nervousness and rapid heartbeat are mostly caused by increased sympathetic excitability and more sensitive neural regulation, physiological reasons such as poor psychological quality, pathological reasons such as hyperthyroidism, heart disease, etc. If you are prone to nervousness and rapid heartbeat on important public occasions such as interviews, and also accompanied by sweaty palms and shaky limbs, you can adjust them through relaxation training, such as deep breathing, diverting your attention to your own breathing rhythm, or clenching your hands to the tightest, feeling the tension in your hands and small arm muscles, and then relaxing, repeatedly. If there is fear of heat, eyelid edema, insomnia and other manifestations, consider that it may be caused by hyperthyroidism, and medication should be administered according to medical advice. If there is chest pain, suffocating discomfort, etc., it may be caused by myocardial ischemia, and medication or surgery is needed. Depending on the cause of tension and rapid heartbeat, we should choose the appropriate department for consultation, including psychiatry, cardiovascular medicine, endocrinology, etc.