Insomnia can be acute or chronic. In acute insomnia the symptoms are present for less than a month. If insomnia symptoms occur for more than one month it is called chronic insomnia.
Age: Insomnia occurs commonly affects old age individuals. Women attaining menopause have sleep disturbances. Men with enlarges prostate as they age causes nocturnal urination disturbing sleep.
Physical or emotional discomfort.
Mental health: Depression and anxiety causes insomnia.
Lifestyle: Night shift work, disturbance is daily schedules.
Jet lag is common temporary cause of insomnia
Certain medications like antidepressants and high blood pressure medication causes insomnia.
Stress: Stress is common cause for insomnia. A death in family, job loss or other stressor can cause insomnia.
Sleep disorders disrupt the normal sleeping habit. The important causes are teeth grinding, bedwetting, narcolepsy, night terrors, parasomnias, restless leg syndrome, sleep paralysis, periodic limb movement disorder.