What should I do if I feel anxious and can't sleep at night?

　　In general, palpitations and insomnia at night may be caused by excessive stress, unhealthy lifestyle habits, anxiety disorders, arrhythmia, hyperthyroidism, and other factors. These conditions can be treated or relieved with general treatments or oral medications based on individual circumstances. It is recommended to seek timely medical attention, identify the underlying cause, and undergo symptomatic treatment under a doctor's guidance. Detailed analysis is as follows:

　　1. Excessive stress: Prolonged high-pressure states, such as stress from work, study, or daily life, can cause palpitations and affect sleep. It may also be accompanied by anxiety, tension, muscle stiffness, and other symptoms. It is recommended to practice relaxation techniques such as deep breathing, meditation, yoga, and other methods to help relieve physical and mental tension.

　　2. Unhealthy lifestyle habits: Consuming coffee, strong tea, alcohol, or engaging in vigorous exercise before bedtime may lead to palpitations and difficulty falling asleep. Symptoms may include insomnia, vivid dreams, and frequent awakenings. It is recommended to adjust lifestyle habits and avoid consuming stimulants such as coffee, strong tea, and alcohol before bedtime.

　　3. Anxiety disorders: Prolonged states of tension and anxiety may disrupt nervous system function, leading to symptoms of palpitations and affecting sleep. It may be accompanied by symptoms such as dizziness and chest tightness. Patients may use medications such as compound diazepam tablets, estazolam tablets, alprazolam tablets, etc., under a doctor's instructions.

　　4. Arrhythmia: This may be caused by abnormal cardiac electrophysiology, structural heart abnormalities, and other factors, leading to reduced cardiac pumping efficiency and causing symptoms such as palpitations and chest tightness. It may also be accompanied by chest pain, fainting, fatigue, and other symptoms. Patients may take medications such as quinidine sulfate tablets, procainamide hydrochloride tablets, verapamil hydrochloride tablets, etc., as directed by a physician.

　　5. Hyperthyroidism: This condition may be related to genetic factors, mental stress, and other causes, resulting in excessive secretion of thyroid hormones, which can cause palpitations, anxiety, and sleep disturbances. It may also be accompanied by symptoms such as weight loss and excessive sweating. Patients may use medications such as methimazole tablets, propylthiouracil tablets, carbimazole tablets, etc., under a doctor's guidance.

　　In daily life, it is important to maintain emotional stability and avoid excessive fatigue and emotional excitement.