Waking up often at 2-3 a.m. is a phenomenon of early waking. The causes of early waking, including physical causes, mental causes, and the effects of lifestyle and environmental factors. Physical causes are mainly common physical diseases and taking medications that can affect sleep, such as common indigestion, headache, back pain, arthritis, heart disease, diabetes, asthma, sinusitis, ulcer disease, etc. There may also be medications that affect the central nervous system that cause early waking. Mental causes, mainly mental stress, excessive tension, anxiety, depression, etc. If the mood lasts for more than two weeks, you need to be alert to whether you are suffering from depression, because the characteristic manifestation of sleep disorder in depression is early awakening. In addition, lifestyle reasons, some people often work at night or have an irregular daily life, as well as drinking coffee and tea before going to bed, and other situations, can easily cause early waking. The sleep environment may also cause early awakening, such as a sleep environment that is too noisy, bright, and other situations.