Thanks for your reply doc.
Hi, welcome to the forum, your symptoms are suggestive of sinusitis. The causes of these are bacterial infection like streptococcal, staphylococcal, Tuberculosis, Bronchiectasis and Fungal infections. This can be associated with postnasal drip and throat clearing. This can in turn irritate the throat lining.
If infection is suspected, you need to send the sputum or throat swab for culture, microscopy, staining to rule out the pathogen and should also take chest radiograph. Antibiotic sensitivity of culture will decide the effective drug.
The other possibilities are gastro esophageal reflex disease, hyperplastic tonsil, abnormal upper esophageal sphincter function, stress or psychological abnormality causes this sensation due to altered upper esophageal pressure. You may need to undergo endoscopic evaluation. A course of proton pump inhibitor against prescription will help in such cases.
Firstly I suggest you to consult ENT surgeon for possible causes and further management. Take care and regards.