The most common causes are stress, lifestyle factors, as well as an irregular sleep schedule. This is why it is important for adults to take some time for rest and relaxation, adjust their sleep schedule, and make sure to avoid situations that can disrupt your normal sleeping schedule.
However, if you feel that you can no longer do anything about your insomnia, do not hesitate to talk to a doctor about it.
2. Sleep apnea

Sleep apnea is a sleep disorder wherein a person’s breathing starts and then stops. The most common symptom of sleep apnea is snoring, but it can also cause a person to stop breathing during sleep, a morning headache, insomnia, and gasping for air while sleeping.
What causes sleep apnea?
Sleep apnea occurs when the muscles in the back of a person’s throat start to relax when sleeping. When these muscles start to relax, the airway gets narrower, which makes breathing more difficult.
Your brain notices this sudden change in your breathing, and you can wake up for a moment so that you can breathe better. Usually, people with sleep apnea don’t even notice these short moments of waking up.
Sleep apnea can make a person feel tired in the morning even if they had a full night’s rest. It can also lead to more serious problems such as high blood pressure, liver problems, and problems with metabolism. Another effect of sleep apnea is that it can disrupt the sleep of other people, because sleep apnea also triggers snoring.
3. Narcolepsy
Narcolepsy is a condition wherein a person falls asleep no matter where they are. This means that a person could fall asleep without any warning, even if they’re in the middle of working. It can also cause people to feel very drowsy during the day, and can cause insomnia, and difficulty sleeping at night.
What causes narcolepsy?
The main cause of narcolepsy is the lack of a chemical called hypocretin. Hypocretin is a chemical produced by the brain that helps regulate sleep. It is believed that this happens when the immune system mistakenly attacks parts of the brain that produce this chemical.
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