 [ Symptoms ] i have no trouble falling asleep but i wake up between 15 20 times a night do i need to undergo a sleep study [ Disease ] having difficulty maintaining sleep is a very common problem you are definitely not alone insomnia in all its forms is the commonest sleep disorder there are many causes of sleep maintenance insomnia some common ones include sleep hygienehabits that prevent sleep continuity such as alcohol or caffeine use in the evening poor sleep environment pets in bed bad mattress snoring from bed partner etc  use of certain medications at night certain medical and psychiatric disorders and various sleep disorders such as sleep apnea leg movements at night the list of disorders that can cause this problem is large you should definitely discuss this with your family physician heshe may be able to recommend ways to improve your sleep if not heshe may refer you to a sleep specialist however i would not necessarily simply get a sleep study as that in of itself may not lead to a diagnosis