The reasons could be manifold. Upon examining you and understanding the symptoms would it be possible to indicate the reason for the sleep disorder. The most common problem is sleep apnea. Sleep apnea is when partly or fully blocked airways cause you to stop breathing for a few seconds to a few minutes during sleep. It’s usually a partner who notices the symptoms, which include snoring or choking or gasping for breath during sleep. Another clue can be feeling tired or falling asleep during the day. Left untreated, sleep apnea can cause high blood pressure, heart enlargement, abnormal heart rhythms, poor memory or concentration, irritability and depression.