The key symptom of insomnia is difficulty falling asleep, staying asleep, or waking too early, despite having the opportunity to sleep well. 8-10 For insomnia to be diagnosed, sleep difficulties must have been present for more than one month.
Other common symptoms of insomnia include:8-10
- fatigue, tiredness, or lack of energy
- problems with attention, concentration or memory
- difficulties performing social, work, or caregiving responsibilities
- making avoidable errors or having accidents at work or while driving
- low mood or feeling irritable
- tension headaches or digestive problems
- daytime sleepiness, or feeling ‘tired and wired’ during the day but not necessarily sleepy
- worrying about sleep, or about functioning the next day.