Hi welcome to HCM... Here you can have chronic posterior wall pharyngitis or tonsillar enlargement ... Work up needed with .... -Auscultation -posterior pharynx examination -chest x ray and throat swab only if needed -CBC with differential count For your case you might need antihistaminic drug to relieve cough that is phenylnephrine .... Take more water Avoid smoking .... Because smoking can lead chronic mucosal damage of pharynx and cough can be there ... Irritant spicy foods avoided .... One tsp honey and ginger juice mixed and taken for soothing ... Take care Advise : otorhinolaryngologist for examination...