The sensory mucosa for smell is located in the roof of your nose. For you to be able to smell anything, those molecules need to be able to reach the roof of your nose unobstructed.
Unfortunately, your allergies have caused your nasal mucosa to swell up, and the sneezing bouts have probably led to sinonasal polyposis. All this have caused a huge obstruction to the nose causing your anosmia.
Endoscopic Sinonasal Surgery is your best option an is a minimally invasive surgery to free up your nose so that you can smell again.
You do have another option - high dose oral corticosteroid therapy, but I reserve this option only for those patients who are unfit for surgery as this has a huge list of side effects that sometimes may be longterm whereas Nasal Surgery means minor discomfort for a maximum 2 weeks at most followed by intranasal corticosteroid sprays(safe even in
pregnant women) for about 6 months & results within 2 weeks.
BUT GO FOR THE BEST NASAL SURGEON IN YOUR CITY... Use the practo app to help you select the right doctor( on with most positive patient reviews)