I do not know

Does this happen when you eat/drink? If so it is part of PD.

Sorry so long to answer. I can give you some things to check for but you've probably done them. Is it worse when laying down.? Are you drinking enough fluid? Can you manage hard candy? Lemon drops work for me. They are really sour. Then if all else fails have a hot toddy. Just kidding. I had a very bad cold once and it was not responding to anything the Dr. Suggested he said if all else fails have a hot toddy.I'll let you decide. Also if it's dry in your house add some moisture. Hope you're better by now BLESSINGS.

Thanks anyway.