There are a number of reasons why a person may have trouble sleeping. Stress or anxiety is a common cause of sleep disorders like insomnia. Depression or poor sleeping habits can also lead to insomnia.
A person's lifestyle can cause sleep disturbances. Insomnia and sleep apnea can occur due to an unhealthy lifestyle.
People who are overweight or who consume a lot of caffeine or alcohol are more likely to suffer from sleep apnea or insomnia. Large meals before bed can also cause sleep problems.
Some sleep disorders are not dangerous in themselves, but if left untreated they can lead to serious health complications. Lack of sleep can lead to poor motivation and decreased concentration, which can prevent a person from getting enough exercise during the day. This can lead to weight gain and additional health complications.