If a patient has a strong heartbeat before bedtime, there are usually several factors as follows: 1. sympathetic nerves are too excited, if the patient drinks too much coffee or strong tea before going to bed, there will be a strong heartbeat. 2. other physiological factors cause sympathetic nerves to be overexcited, such as excessive emotional excitement and tension, staying up late, etc., there will also be the above symptoms and performance before bedtime. 3. pathological factors, such as endocrine system diseases The clinical symptoms of panic and palpitations will also occur at bedtime. 4. endocrine diabetes mellitus will also have palpitations at bedtime when there is a hypoglycemic reaction. 5. cardiogenic diseases, such as coronary heart disease leading to arrhythmia, will also have the above symptoms.