一、病因目前病因还不清楚;可能以下列因素有关:①遗传因素:在一家族中同时有5人发病,所以此病可能为常染色体显性遗传,但是临床病例中大多数病人并无遗传家族史。②代谢紊乱:患糖尿病、贫血、尿毒症及妊娠后期者合并此病较多,很可能以代谢紊乱有关。③血管运动功能失调:本征大多在安静时发病,运动后缓解的特点,在 First, the cause of the disease is unclear; may be related to the following factors: ① genetic factors: in a family of five people at the same time the incidence, so the disease may be autosomal dominant, but in clinical cases, most patients have no genetic Family history. ② metabolic disorders: suffering from diabetes, anemia, uremia and pregnancy are more complicated by the disease, it is likely related to metabolic disorders. ③ vascular motor dysfunction: most of the symptoms onset in the quiet, exercise relief characteristics, at