most doctors go by the blood lab scale , the scale goes up to 5.5 (most of them ) if you are 5.1 they will say it is fine and in range but, most people do better when it is as close to 1 as you can get a little under is best for me.. anything over 3 i feel awful even to pain and breathing is worse so, see if her tsh range is between 1-2 ... if it is lower than .45 she is hyper but i seem to doubt that both ways have similer symptons except hyper people lose weight and thier heart races .... hypo you gain weight and at least with me my heart flutters...both will have you feeling tired... hope this helps.