Hubby gets vertigo. There is the epley maneuver. You rapidly lay down on your back with your head hanging over the edge of your bed. You turn your head to the side of the affected ear & you can also look at the pupils in your eyes & tell which side is affected. The pupil will be dilating in the eye on the affected side.
You keep your head turned a good half minute so the ear is parallel to the floor & then turn your head rapidly to the other side. What your trying to do is get the floaters in the inner ear normally distributed. Then spend the next 24 hours in a semi right position sleeping up right & no bending over to pick anything up or quick turning of the head. It has worked for hubby sometimes but then there are times he had to go in to the therapist.