 [ Symptoms ] what causes a sudden onset of vertigo while lying down or turning while lying down  within the last two weeks i have begun to experience sudden vertigo while lying down or just turning while lying down if i try to stand up i am completely disoriented i do not understand what is causing this i am not on any medication do not drink or smoke what could be causing this [ Disease ] what you need to find out is why his doctor recommended not eating bananas in the first place it may be because his potassium levels are high if so there are many other foods that are a good source of potassium he should know about so find out the reasoning and then decide what you want to do good luck