Hello,
I would suggest thst she have a consult with an ENT (ear, nose & throat soecialist). It may be that she has a sinusitis which is causing her symptoms. It would be a good idea to rule out nasal polyps as well.
http://www.mayoclinic.com/health/chronic-sinusitis/DS00232
http://www.mayoclinic.com/health/nasal-polyps/DS00498
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