Children’s fever hands and feet blue may be the cause of perivascular circulatory disorders, may also be related to heart disease. 1. perivascular circulatory disorders: children’s fever hands and feet green may also be the body to reduce heat dissipation, peripheral vascular contraction, resulting in perivascular circulatory disorders in the hands and feet, causing green. 2. heart disease: children with fever hands and feet green may also be heart disease, the presence of viral myocarditis leads to blood circulation in the body, the hands and feet of insufficient blood supply caused by green. Children’s fever hands and feet green, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.