Sleep disorders are a group of conditions that affect the ability to sleep well on a regular basis. Whether they are caused by a health problem or by too much stress, sleep disorders are becoming increasingly common in the United States. In fact, more than 75 percent of Americans between ages 20 and 59 report having sleeping difficulties fairly regularly. Most people occasionally experience sleeping problems due to stress, hectic schedules, and other outside influences. However, when these issues begin to occur on a regular basis and interfere with daily life, they may indicate a sleeping disorder. Symptoms of Sleep Disorders Symptoms can differ depending on the severity and type of sleeping disorder. They may also vary when sleep disorders are a result of another condition. However, general symptoms of sleep disorders include: difficulty falling or staying asleep daytime fatigue strong urge to take naps during the day irritability or anxiety la...