Various groups have been developing a fast, cheap, non-invasive saliva swab test to determine whether laryngopharyngeal reflux (LPR) is present or not. LPR may cause symptoms of: Hoarseness Chronic (ongoing) cough Frequent throat clearing Constant mucus or phelgm in the throat Dry or sandpaper like sensation in the throat Pain or burning sensation in the throat Feeling of a lump in the throat (globus pharyngeus) Problems swallowing Bad/bitter taste in the mouth (especially in m…