Changes in air pressure in the ear can cause dizziness. There is a chance that the flow from your PAP machine is traveling through your Eustachian tubes and entering into the middle ear. This change in pressure would result in the feeling of being dizzy or unbalanced. If you are experiencing any dizziness believed to be caused by your PAP machine please contact your General Practitioner to rule out ear infection or vertigo. Give our office a call so we can contact your sleep doctor in regards to potentially lowering your PAP pressure.