Tachycardia can be caused by nervousness, anemia, hyperthyroidism, staying up late, cervical spondylosis, myocardial ischemia, hypoglycemia, high blood pressure, or low blood pressure, etc. Normal people may also experience faster heart rates when eating, climbing stairs, walking, exercising, feeling nervous, or when drunk. Tachycardia is just a symptom, and it is advised to visit a regular hospital for relevant examinations to obtain a clear diagnosis and appropriate treatment. It is also important to avoid being picky with food, not to consume too much junk food, and to drink teas that may improve microcirculation. Engaging in aerobic breathing exercises or beneficial health and wellness therapies can boost resistance. Additionally, one should not smoke or be around smokers, nor live in newly renovated houses to avoid potential discomfort.