Insomnia
Insomnia is the most common sleep complaint. It occurs when you have trouble falling asleep or staying asleep even though you had the opportunity to get a full night of sleep. The causes, symptoms and severity of insomnia vary from person to person. Insomnia may include:
1. Difficulty falling asleep.
2. Difficulty staying asleep throughout the night.
3. Waking up too early in the morning.