When experiencing tachycardia, it is first important to determine the cause. If the tachycardia is due to emotional excitement or excessive exercise, one should maintain stable emotions and rest adequately. If tachycardia is caused by other reasons such as atrial fibrillation with rapid ventricular rate, or paroxysmal supraventricular tachycardia, treatment should target the atrial fibrillation or the paroxysmal supraventricular tachycardia. Tachycardia caused by conditions like hyperthyroidism, fever, or anemia should be managed by treating the hyperthyroidism, anemia, fever, and lowering the body temperature, etc. During tachycardia, it is advised to avoid spicy foods, strong tea and coffee, alcohol, etc. The specific cause of tachycardia should be determined by a specialist who can then provide an appropriate treatment plan.