The symptoms of premature heartbeats are mainly palpitations and a feeling of a falling heartbeat, but they can also be unnoticeable. Premature heart beats can be classified as sinus, atrial, atrioventricular junction or ventricular depending on the origin of the abnormal beat. Among them, ventricular premature beats are the most common, followed by atrial premature beats. Although the types of premature beats are different, the clinical symptoms of patients are similar. The frequency of premature contractions can be divided into episodic contractions of less than 5 beats/min and frequent contractions of more than 6 beats/min. Most of the episodic premature contractions are not obvious, but sometimes there may be palpitations or a feeling of a falling heartbeat, while patients with ventricular premature contractions may sometimes feel a pulling and tightening sensation in the throat. In patients with premature beats, the pulse may be palpable at the onset of the beat followed by a long interval. When premature beats occur more frequently or in greater numbers under the influence of triggers such as exertion, alcohol consumption and emotional stress, they may affect the normal blood supply to the heart, brain, kidneys and other important organs, causing chest tightness, palpitations, dizziness, weakness, and even heart failure. It is important to note that the symptoms of premature beats do not reflect the severity of premature beats. Many patients with frequent premature contractions may have no obvious symptoms. When premature beats are detected, it is important to consult a doctor for clarification. The symptoms of premature contractions vary from patient to patient, and many patients do not have any obvious clinical manifestations. It is important to note that the symptoms of premature beats do not correlate with the severity of premature beats in clinical practice, and treatment of frequent premature beats should not be neglected because of the absence of symptoms.