What causes insomnia at night?

There are many factors that may cause patients to show insomnia at night. For example, some patients, if they drink tea, coffee, drink strong tea before bed, like watching TV, playing games, sleeping irregularly, like staying up late to work, will always let the patient normal rest, causing patients to show insomnia. Some patients because of personality reasons, too high on their own requirements, excessive attention to sleep, the pursuit of perfection, all habits to think bad, excessive tension, anxiety, depression, bipolar disorder, schizophrenia or combined cardiopulmonary dysfunction, cerebral hemorrhage, cerebral infarction, hypertension, diabetes and other diseases, these patients are easy to show insomnia. For such patients, it is recommended to see a doctor as soon as possible.