Sir, my 25 yrs old sister is facing problem like unbalanced walking(she can walk herself),her face is shaking and her head spins sometime.she has long constipation problem also. she has undergone blood, BP , urine test, ecg and MRI ..all the reports are normal.. still she is having this problem for last 10 days.. she used to study late night. i m not getting any clue.... could u pls send me ur valuable advise thank u sir