There are two main causes of premature beats: the first is cardiovascular diseases, such as coronary heart disease, rheumatic heart disease, hypertension and myocarditis. Another kind of premature beat is more common in healthy people, and its occurrence is related to bad living habits such as overwork, mental stress, excessive smoking and drinking. However, there are still a few premature beats, and even if they are followed up for several years or longer, the exact cause cannot be found. Patients don't have to go to great lengths to find out the truth before they can rest assured; According to your situation, take medicine under the guidance of a doctor if necessary. I hope my answer is helpful to you, and I wish you health and happiness.