Pulmonary embolism may cause back pain. Because pulmonary embolism may affect the heart when the condition is more serious, thus leading to a decline in cardiac function, patients may have symptoms such as arrhythmia, chest tightness, shortness of breath and palpitations, which in severe cases may cause chest pain, and the symptoms may radiate to the back, thus causing back pain. If it is related to pulmonary embolism, patients may have symptoms such as dyspnea and fainting during the onset of the disease, and in severe cases, it may cause hemoptysis, lower limb pain, lower limb swelling, and nervousness, etc.; some patients may have cold and clammy skin, cyanosis, etc., which is related to transient hypoxia. At present, it is recommended to be hospitalized for observation, and after the condition is stabilized, it is recommended to consult the cardiovascular medicine department in time if the cardiac symptoms are more serious; and for patients with more serious respiratory symptoms, it is necessary to consult the respiratory medicine department as soon as possible.