<unk>  is a medical term which refers to three conditions that are considered by physicians necessary for proving hypoglycemia as the cause of a person's symptoms. They are stated in various versions, but the essential conditions are:
Whipple's triad
Ballance's sign
Oliver's sign
Faget's sign
Rovsing's sign
Homans' sign
Kernig's sign
Wolffenstein-Böters reaction