A night of sleep, breathing stops more than 10 seconds duration are considered apnea, decreased oxygen in the blood at this time, the body in a hypoxic state. If the apnea occurs frequently, more than 5 times per hour – or 7 hours of sleep for more than 30 times, Jinian after year, no effective treatment, it will cause serious consequences, a series of pathophysiological changes, can be diagnosed with sleep apnea syndrome. It is different from a certain kind of simple diseases, is caused by a variety of clinical syndromes. Because apnea occurred, interrupted breathing air, oxygen, and patients with recurrent awakenings from sleep, endanger various body systems, complex and diverse clinical manifestations. The main clinical manifestations such as snoring, apnea, abnormal limb movements during sleep occurs at night so sleep, I have generally not aware of patients; the wife, children or friends, although often encounter patients with the occurrence of apnea, suffering noise disturbance, in fear and worry to spend a sleepless night after another, but it is difficult with these patients daytime drowsiness, irritability, and memory impairment associated with, some mistakenly believe that the sleeping snoring performance; due to limited knowledge, even if the individual were thus four visits, it is often misdiagnosed as heart disease, neurosis, and even some doctors a cold “or snoring disease?” and turned away. All this makes the understanding of sleep apnea syndrome, the main symptoms, coupled with careful observation, without the aid of instruments to help, you can roughly estimate your family, friends, or whether you may be suffering from sleep apnea syndrome, for further medical treatment for an accurate diagnosis, treatment, provide clues. Since 1989 to carry out the diagnosis of sleep apnea syndrome and treatment, we have been through the self-designed questionnaire statistics of the clinical symptoms of hundreds of people, through the instrument of accurate diagnosis, analysis found that the frequency of symptoms and see the next article, consistent with the foreign reports. The most important clinical manifestations of sleep snoring, daytime sleepiness and frequent apnea.