It is very common for people with a diagnosis of PTSD to experience some type of problem sleeping. In fact, difficulty falling and/or staying asleep is considered one of the hyperarousal symptoms of PTSD, and studies have found that sleep problems are one of the most commonly reported symptoms reported by people with PTSD.
People with PTSD may experience a number of different types of sleep problems. Many people with PTSD have difficulties falling asleep as compared to people without PTSD. In addition, PTSD may make it difficult to stay asleep during the night. Of course, nightmares, one of the re-experiencing symptoms of PTSD, are also very common among people with PTSD. Because of these sleep problems, people with PTSD may even develop fears about going to sleep. Finally, PTSD may lead to conditions that interfere with sleep, such as sleep apnea.
If you have difficulties sleeping, there are steps you can take to improve your sleep. Learn more about how sleep problems in PTSD develop, as well as ways of improving your sleep in this article from About.com.