Tachycardia in adolescents is mainly divided into two categories: physiological and pathological, the specific causes are as follows: 1, physiological is more common, tachycardia is common among young people, according to statistics, accounting for 16.8% of all young people’s consultation rate, clinically known as tachycardia in puberty, commonly found in drinking coffee, exertion, staying up all night, stress, anxiety and other situations. For physiological tachycardia, clinical treatment is generally not required, and the above symptoms can be relieved after eliminating stressful factors, resting, and avoiding exertion; 2. Pathological tachycardia is relatively rare, and most of it is caused by cardiac organic diseases, including atrial flutter, pre-excitation syndrome, and viral myocarditis. If tachycardia is accompanied by symptoms such as panic, sweating, chest tightness, etc., electrocardiogram, echocardiogram, dynamic electrocardiogram and other related examinations are needed to clarify the cause.