there is granulations on posterior pharyngeal wall which can be due to persistent irritation of mucosa there , this can be because of two reasons either post nasal drip or laryngoesophageal reflux.
U need to watch for your symptoms and habits like dont stay empty stomach alot and avoid having spicy and oily food , tea and coffee, drink a lot of water And start steam inhalation for some days if u have allergic symptoms like excessive sneezing , runny nose on exposure to dust.
You should start tab sompraz L empty stomach and tab belatin 40 in evening before food with syrup raciraft 2 tablespoon after major meals . take steam twice a day followed by azeflo ft nasal spray for 15 days . Get your serum
vitamin D checked in allergic conditions vitamin D levels are quite low.
Next Steps
If still not relieved visit a nearby ENT