There are many clinical causes or triggers of insomnia, common causes include: 1, psychosocial factors: various unpleasant events in life and work often cause individuals to have anxiety, tension, depression and other stress reactions, often manifested as insomnia; 2, environmental factors: noisy environment, uncomfortable light, too cold and too hot and dirty air or odor, etc. may lead to insomnia; 3, physiological factors: such as hunger before bedtime, too full before bedtime, excessive fatigue, etc. are also prone to insomnia; 4, mental illness: almost all types of mental illnesses have sleep disorders, especially anxiety or depression; 5, food and drug factors: such as alcohol, coffee, as well as food and drugs. 4, mental illness: almost all kinds of mental illnesses are sleep disorders, especially anxiety or depression; 5, food and drug factors: such as alcohol, coffee and tea and other excitatory beverages, improper timing or excess and the use of certain therapeutic drugs, there may also be insomnia adverse reactions, such as angiotensin-converting enzyme inhibitor class antihypertensive drugs 6, changes in sleep rhythms: frequent daytime and nighttime shifts and travel across time zones, resulting in changes in biological clock rhythms; 7, neurological and physical diseases: such as hyperthyroidism, Parkinson’s often lead to insomnia; 8, life behavior factors: excessive daytime rest, smoking, too much exercise before bed may lead to insomnia; 9, personality factors: some patients are often overly concerned about health. Some patients are often overly concerned about their health, overly cautious about life and work, all of which put them in a state of high alertness and can easily cause insomnia. All of the above reasons may cause insomnia every other day. In clinical practice, doctors will analyze the specific causes of insomnia according to the patient’s specific situation.