The few allergy tests that were done were negative. Sinus CAT scans also were negative. She has not smoked for 30 years. She has a hiatal hernia, for which she takes a Zantac at night to reduce the possibility of stomach acid irritating her throat. An ENT indicated that even without a reflux, some small amount of acid could irritate her throat causing a cough.
Most doctors look for green or yellow mucus as a cause, but there is none.
However, she does have spittle that is full of air, similar to a meringue, which sticks in her throat. She is constantly trying to cough it up, but it is very difficult. It is worse upon arising in the morning. She takes a Chlor-Trimeton, which gives her minimal relief. The constant coughing also causes a headache.