Hello, There could be two causes -- 1. nasal allergies / disease like blockage,discharge etc if you have, as the nasal discharge fall back in throat and irritates it. you need to consult your ENT specialist to get examination and CT scan nose with plain coronal views limited cuts,, if required to rule out any disease in nose and paranasal sinuses 2. Take care of reflux, It is one of the reason for recurrent throat irritation ,, it doesnot matter you feel heart burn acidity or not. Take--- Antacids and antireflux medicines . Precautions— 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 In doubt do reply.