A 59-year-old man experienced severe dizziness and loss of balance, resting at home believing it was a vestibular disorder, until doctors diagnosed a cerebellar stroke upon his hospitalization.

I often feel dizzy, a spinning sensation, whenever I tilt my head back or turn over, lasting a few seconds. What illness is this, is it a vestibular disorder? (Kim Ngan, 35, TP HCM)