When sinus tachycardia is detected, it needs to be treated promptly after the cause is identified. Sinus tachycardia is a sinus rhythm with a frequency of more than 100 beats per minute, which can be caused by various physiological factors or secondary to other non-cardiac or cardiac diseases, and is very common in clinical practice. When sinus tachycardia is detected, the first step is to seek prompt medical attention, except for the possibility of sinus tachycardia caused by non-physiological factors. This includes non-cardiac diseases secondary to fever, anemia, hyperthyroidism, and the presence of underlying cardiac diseases such as myocarditis and pericardial effusion. After effective treatment of the primary disease, sinus tachycardia can mostly resolve on its own. In addition to the possibility of other diseases, it is necessary to avoid physiological factors that may induce sinus tachycardia, such as stress, anxiety, exercise or excessive consumption of coffee, strong tea or alcohol, etc. Most patients can effectively relieve sinus tachycardia after treating the primary disease and avoiding the triggers. If the above methods are not effective, heart rate control drugs such as beta-blockers or calcium antagonists can be taken under the guidance of physicians. Most sinus tachycardias can be effectively improved by treating the primary disease and avoiding the triggers. Patients who fail to do so can be treated with medication of their choice under the guidance of a medical professional.