Rapid heartbeat after lung nodule surgery is a common postoperative complication, and the causes of this condition mainly include intraoperative bleeding, lack of oxygen and fever. 1. Intraoperative bleeding: After the lung nodule surgery, which causes obvious bleeding in the body, it may lead to hemorrhagic anemia, and the insufficient supply of nutrients and oxygen in the body will lead to compensatory rapid heartbeat. 2. Lack of oxygen: After the surgery, the lung function has not fully recovered, and the ability to supply oxygen decreases, which further leads to accelerated heart rate and promotes the body’s metabolism. 3. Body fever: there may be inflammatory reactions after surgery, leading to fever symptoms, the corresponding conditions will directly increase the body’s metabolic rate, resulting in a faster heart rate. In addition, such as postoperative stress reaction, the absorption of fluid in the surgical area, etc. can also cause the heart rate to accelerate. After the nodule surgery, accompanied by obvious fast heartbeat and symptoms such as chest tightness, you need to consult a doctor for observation, diagnose the specific cause of the disease, and carry out standardized treatment under the guidance of the clinician.