Tachycardia is defined as a heart rate of more than 100 beats per minute. The causes of tachycardia are physiological and pathological. Physiological tachycardia is mostly caused by acquired habits, such as the love of strenuous exercise and heavy physical labor, such as running, boxing, bricklaying, etc.; some people like to drink coffee, which will make the whole nerve excitement, and affect the heartbeat; smoking and drinking alcohol or tea can also lead to tachycardia. There are many causes of pathological tachycardia, but the most common is caused by heart disease, such as myocarditis, heart failure, severe anemia can lead to tachycardia, in addition to hyperthermia, hyperthyroidism, bleeding, pain, hypoxia and other diseases that cause tachycardia, these conditions are pathological tachycardia, and is the main cause of tachycardia. For patients with tachycardia, it is best to take some fresh vegetables and fruits every day, and to eat a low-fat and low-fat diet, with more minerals and vitamins, which is good for the recovery of heart function. There are many causes of tachycardia, so we should pay more attention to it in our daily lives.