You might be asked not only to fill a questionnaire about your sleep pattern, but to also keep a diary for a few weeks in which you track your sleep patterns and daytime sleepiness levels.
Your doctor may conduct a physical exam or administer blood tests to check for other health conditions like thyroid that may result in poor sleep.
In some instances, a sleep center where tests are conducted is recommended. During the study, they monitor and record brain waves, breathing, eye movements, body movements, heartbeat and more while you sleep to figure out the cause of insomnia if it isn’t otherwise clear.