What Is The Cause Of Shivers All Over Body?

Dear sir,

My name is Saurabh patel this is to inform you that am searching for permanent remadey for my sis. She is suffering from a seaver problem like vibrations in the legs, hands, tounge as well as in the head. There no fix period or time of this problem. It happens in any hour of the day. It is been since one year we showrd to many neurologists but didn't got any solutions. There is tension in my family regarding her. Please recommended any doctor if possible. Thanks