Vertigo is a sensation of spinning. If you have these dizzy spells, you might feel like you are spinning or that the world around you is spinning. Vertigo may be associated with head or neck injury. Vertigo is often triggered by a change in the position of your head. People with vertigo typically describe it as feeling like they are spinning, tilting, swaying, unbalanced, pulled to one direction. Other symptoms that may accompany vertigo include feeling nauseated, abnormal or jerking eye movements (nystagmus), headache, sweating, ringing in the ears or hearing loss.
Vertigo, WebMD, https://www.webmd.com/brain/vertigo-symptoms-causes-treatment#1
ii. Benign Paroxysmal Positional Vertigo (BPPV)
Benign Paroxysmal Positional Vertigo (BPPV) is one of the most common causes of vertigo; the sudden sensation that you’re spinning or that the inside of your head is spinning. It is characterized by brief episodes of mild to intense dizziness. Symptoms of benign paroxysmal positional vertigo are triggered by specific changes in the position of your head, such as tipping your head up or down, and by lying down, turning over or sitting up in bed. You may also feel out of balance when standing or walking.