What causes recurrent insomnia?

Insomnia is the most common sleep problem, more and more young people lack sleep, showing chronic sleep deprivation. The main causes of insomnia include: first, physical reasons: such as joint pain, muscle pain, palpitations, shortness of breath, cough, itching and frequent urination and other physical symptoms caused by sleep apnea syndrome also belongs to this category of reasons. Anxiety, depression with insomnia, anxiety to sleep difficult-based, depression to wake up early in the morning mainly. Four, mental causes: mental illness such as schizophrenia, reactive psychosis. Five, drug causes: central stimulants such as amphetamine, Ritalin and other causes, long-term use of sleeping pills suddenly stopped can also show withdrawal symptoms, manifested as shallow sleep, nightmares more.