I have this strange episodes of dizziness that lasts for a few seconds and are brought on by sitting in a certain position on a chair, such as at the edge of the chair. This mostly happens during summer season when it is hot.

Once I was straining my neck to look closely at the monitor when I had a vertigo. My arms aren't raised above my head when this happens. There is no nausea associated with it.

Has anyone felt like this?