The heart beating and shaking legs may be caused by physiological reasons, or may be caused by hypoglycemia, hypokalemia and other pathological reasons, according to the specific reasons, general treatment, drug treatment and so on. 1. Physiological reasons: strenuous exercise, emotional over-excitement, etc., leading to increased sympathetic excitability, which can cause rapid heartbeat, panic and shaking hands, etc., can be relieved through proper rest and adjustment of the mind, without special treatment. 2. Pathological causes. Hypoglycemia: When hypoglycemia occurs, the body releases a large amount of adrenaline and catecholamines, which stimulate the sympathetic nerves of the human body and lead to excessive excitation of the sympathetic nerves, thus causing the heart to beat chaotically and symptoms such as panic attacks and shaking legs. This condition requires prompt intake of substances such as regular sugar and honey water. Severe hypoglycemia can be treated by intravenous glucose injection. Hypokalemia: Potassium ion is an important substance to maintain the normal function of the heart. Hypokalemia will reduce the stress of the heart muscle, leading to various arrhythmias and conduction block, which may show symptoms of heart beating and leg shaking. This condition can be treated with oral rehydration salts, potassium chloride extended-release tablets and other medications under medical supervision. If the symptoms are more serious, the condition can be treated by intravenous injection of potassium chloride. In the case of heart beating and leg shaking, it is recommended to go to the hospital for examination and treatment in time. Avoid delaying the condition.