Tachycardia refers to the phenomenon where the heartbeat exceeds 100 beats per minute. From a medical perspective, this can be classified into various types of tachycardia including sinus tachycardia, paroxysmal supraventricular tachycardia, ventricular tachycardia, among others. If one experiences such symptoms, it is crucial to visit a hospital for proper checks. An electrocardiogram (ECG) should be done to determine the specific type of tachycardia. Additionally, a complete blood count should be performed to check for anemia that might be causing tachycardia. Thyroid function tests including TSH, T3, and T4 should be conducted to rule out hyperthyroidism as a possible cause. Also, an echocardiogram should be done to check for any structural heart diseases that might lead to tachycardia.