The heartbeat is sometimes as uncomfortable as being frightened may be caused by coronary heart disease, hyperthyroidism, myocarditis, etc. According to the specific causes, targeted treatment is needed. 1. Coronary heart disease: when suffering from coronary heart disease, due to atherosclerosis of the coronary arteries, it is easy to cause the heartbeat to accelerate, and the heartbeat may be as uncomfortable as being frightened. It can be treated with aspirin capsules, clopidogrel bisulfate tablets and other medications under the guidance of a doctor. For more serious symptoms, treatment can be done through percutaneous coronary intervention and coronary artery bypass grafting. 2. Hyperthyroidism: When hyperthyroidism occurs, it can cause a large amount of thyroxine to enter the bloodstream, which can lead to a significant increase in the heart rate, and may result in a heartbeat that is sometimes as uncomfortable as a fright. It can be treated with medications such as methimazole tablets and propylthiouracil tablets under the supervision of a doctor. Severe symptoms can be treated by surgical removal of part of the thyroid tissue. 3. Myocarditis: caused by viral, bacterial or other microbial infections that can cause damage to the heart muscle. It can cause arrhythmias such as rapid heartbeat. This condition can be treated with medicines such as Compound Danshen Dropping Pills and Heart Stabilizing Pellets as prescribed by the doctor. If the heartbeat is uncomfortable as if it is frightened, it may be caused by other reasons. You need to go to the hospital for examination and treatment in time to avoid delaying your condition.