my pcp referred me to a dpt (doctor of physical therapy) who specializes in inner ear conditions to try to figure out why i have vertigo. at one point in the exam, the dpt shook my head left and right for about five to ten seconds. that sounds like a short time but it felt long to me. afterwards i asked him if what he did was safe and of course he said yes but i am still leery.. i have a follow-up visit with him the day after today and don't want him to do that to me again. does anyone know if this is a normal diagnostic tool?