Sleep studies are tests that help diagnose sleep-related conditions. They’re commonly prescribed by doctors but many people are unsure about what these tests entail so they ignore their doctors’ recommendations to get them done. But don’t let fear stop you from getting a proper diagnosis. Sleep disorders can negatively affect your health and getting a sleep study done is painless and easy to do.

During a sleep study, information about how your body works while you’re asleep, such as your heart, brain, muscles and respiratory system, are recorded. This information is used to diagnose sleep disorders and other health conditions. Here’s what you can expect during the study:

Time and location – Most sleep studies are done in a facility that specializes in these tests, often referred to as sleep labs. The tests are usually done overnight so they mimic a regular night of sleep (if you usually sleep during the day, the study may be done at a different time to accommodate your sleep schedule). You arrive at a specified time, spend the night sleeping (typically in a small private room) and leave early in the morning.

Before you go – Avoid caffeine or alcohol before the study and don’t take a nap during the day. Stick to your daily and nighttime routine as much as possible. Don’t use creams, lotions or hair products so sensors stick properly. Pack a small bag with something comfortable to sleep in and grooming items, like a toothbrush, toothpaste, makeup remover and hairbrush. Bring medications you usually take (unless your doctor has instructed you otherwise).

When you get there – After you check in, you will be directed to a room with a bed, television, chair and bathroom. The room also has a camera so technicians can see and talk to you, as needed, during the study. You’ll have time to change into sleepwear before getting hooked up to the sensors that will record what’s going on in your body while you sleep.

Getting prepped – A technician will attach several types of sensors to your head, face, chest, torso, leg and finger before you get into bed. They have a sticky coating that attaches to your skin but don’t hurt when they’re on or when they come off. There will also be small wires attached to the sensors. Sensors detect brain and eye activity, heart rhythms, breathing, blood oxygen levels and muscle movements. If you have sensitive skin or allergies to adhesive, let the staff know before they do this.

Time to sleep – Once sensors have been hooked up and tested, you’ll get into bed. The sensor wires should allow you to move comfortably but you’ll need to ask a staff member to assist you if you need to get out of bed. While you sleep, sensors will record activity. Video monitoring will also be used to help providers better interpret sensor readings. You may not sleep as well as usual because you’re in an unfamiliar environment, but that usually doesn’t affect study results.

End of study – At a designated time in the morning, you will be woken up if you are not already awake. The sensors will be removed and you will be free to go home. You will get results from the doctor who ordered the study at a later time, once all of the findings have been analyzed.

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