Throat problems could be because of nose or reflux.
You must be well aware that you have nasal allergies , sneezing
,discharge,nasal blockage,phlegm throat etc.
If its there then you must consult an ENT specialist
get examined and if required get done radiological examination like x ray
or ct scan
If you have reflux ie acidity or heart burn etc then you can take precautions like---
Keep head end of bed elevated.
Avoid alcohol, Smoking
Do brisk walking daily
Go for walk after dinner
Avoid spicy food
Avoid late night coffee
And take antacid
medication from your doctor.