Tremor is not a precursor of certain diseases, it may be a physiological phenomenon, but also may be seen in arrhythmia, coronary heart disease, cardiac neurosis, as well as other diseases caused by the body. 1. Physiological phenomenon: when strenuous exercise, emotional excitement, or shock, etc., may lead to tachycardia, increased heart rate, feel the heart trembling. 2. Arrhythmia: such as atrial fibrillation, premature beats, tachycardia, bradycardia, etc., may also feel the heart trembling. 3. Coronary heart disease: Coronary atherosclerotic heart disease can cause insufficient blood supply, which may cause compensatory heart rate increase, and may also feel the heart tremor. 4. Cardiac neurosis: autonomic dysfunction may also lead to increased heart rate, chest tightness and other symptoms, which may also be manifested in the phenomenon of heart trembling. 5. Other diseases of the body: for example, hyperthyroidism, anemia, high blood pressure, etc., may also lead to an increase in the heart beat, and thus the feeling of trembling. There may be other causes of heart tremor, and you need to go to the hospital in time for further examination to clarify the cause of the disease and treatment according to the doctor’s instructions.