If you have PTSD then you probably also have difficulties falling or staying asleep. Sleep problems are very common in PTSD. In fact, sleep problems are one of the most commonly reported symptom among people with PTSD. A new study has found that some of these sleep problems may be due to sleep apnea. This study found that, among combat veterans with PTSD, over half were suffering from sleep apnea -- a rate substantially greater than what is found in the general population. You can read more about this study here.
You can learn more about sleep apnea from Dr. Peters, About.com Guide to Sleep Disorders.