can be due to allergy
, drugs like anti hypertensives etc.
i would advise you to consult a physician regarding this to evalute the same.
in the mean time are you already on any medications as some medications can cause dry cough?
do take some losenges, gargle your mouth with antiseptic mouth wash.
if symptoms worsen call your emergency number.
take care and keep us posted in case you need our help further
thank you for contacting HCM