The causes of irritability are as follows: 1. Physiological reasons, such as high work pressure, poor sleep, or experiencing adversity, can lead to mood swings, resulting in irritability; 2. Pathological reasons, such as the occurrence of arrhythmia, hyperthyroidism, anemia, infection, and other diseases, patients may experience irritability and palpitations; 3. Menopausal women, patients with cardiac neurosis, and patients with anxiety and depression may also exhibit abnormal moods and experience irritability.