The main causes of frequent palpitations and panic attacks are related to the presence of arrhythmia, anemia, low blood sugar, vegetative nervous system disorders, and thyroid dysfunction. 1. Arrhythmia: If there is a problem of arrhythmia, such as bradycardia or tachycardia, it is easy to produce the symptoms of frequent palpitations and panic attacks. 2. Anemia: If there is anemia, it usually affects the function of various body organs, which may cause frequent palpitations and panic attacks. 3. Low blood sugar: If the body has not eaten for a long time and lacks energy, it will easily lead to low blood sugar, which will cause palpitations and panic attacks. 4. Phytoneurological disorders: If there are problems of phytoneurological disorders, such as neurasthenia or psychosomatic disorders, it is easy to produce frequent palpitations and panic symptoms of somatization. 5. Abnormal thyroid function: If there is an abnormal thyroid function, it is easy to affect the level of hormones in the body, which affects the heart function, resulting in frequent palpitations and panic symptoms. If the symptoms are more obvious, you need to consult the doctor in time, improve the examination to clarify the cause of the disease and then carry out the treatment.