佝偻病是维生素D缺乏引起的一种营养性疾病,以婴幼儿时期最为多见。严重者可有龟背、鸡胸、“O”形腿或“x”形腿,弯腰驼背。佝偻病能降低儿童免疫功能,使之易患病,并可加重病情、延长病程;佝偻病儿血钙低,神经兴奋性增高,常并发手足搐搦;重度佝偻病儿常伴有骨骼畸形,行动困难,易合 Rickets is a nutritional disorder caused by vitamin D deficiency, most prevalent in infancy. Serious may have turtle back, chicken breast, “O” -shaped legs or “x” -shaped legs, hunched over. Rickets can reduce children’s immune function, making it susceptible to disease, and can aggravate the disease and prolong the course of disease; rickets children with low serum calcium, increased nerve excitability, often complicated by tetany; severe rickets are often accompanied by skeletal deformities, difficult to move, easy Together