Insomnia? What caused it?

There are many reasons for insomnia, mainly the following three aspects. First, environmental factors, if the patient suddenly changes the long-term living environment, or the living environment is too chaotic, too noisy, the patient is easy to show insomnia. Second, disease factors, such as the patient's physical discomfort, intolerance, will also show insomnia. For example, stomach pain, abdominal pain, or numbness of limbs, or heart disease caused by patients can not lie flat, as well as chest tightness, chest pain, etc., may induce patients to show insomnia. In addition, the lack of certain factors, such as calcium deficiency, iron deficiency and other factors, can also induce patients to show insomnia. Third, the patient's psychological factors, such as excessive tension, anxiety, depression, in addition, life, work, study pressure is too great, may induce patients to show symptoms of insomnia.