Sleeping at night may be irritable because of the following reasons: 1, psycho-psychological factors: too much mental tension, too much pressure to sleep, feeling irritable. Mental diseases are also accompanied by irritability, such as dementia, depression, anxiety disorders, personality disorders and other diseases; 2, bad habits caused by: for example, alcohol, coffee, strong tea at night, can over-stimulate the nerves, so that the spirit can not be relaxed, difficult to sleep, irritable mood; 3, environmental changes: frequent jet lag or change of environment, is a very important reason. The light, sound, temperature, humidity and other factors in the house can also affect the quality of sleep, such as the weather is too hot or too humid, can also lead to the occurrence of the above symptoms; 4, full before bed: eat too much before bed, full abdominal pressure increases later or gastroesophageal reflux, the patient appears to recumbent heartburn, chest tightness and other symptoms, as Chinese medicine says, the stomach is not and sleep restless.