Being anosmic is losing the sense of smell. A person who becomes diagnosed with anosmic can be a result from a large polyps in the sinuses as well as severely swollen turbinates which is the curving of the bone shelf that guides the air to the nasal receptors. Research has shown that there is currently, no known cure or treatment for congenital anosmia. However, other types of anosmia may be improved or cured when the underlying condition is treated. For example, if the cause is swelling in the nose or sinuses, steroids can usually clear this up and restore your sense of smell.
https://www.youtube.com/watch?v=VCkvZFoIgDk here is a video i found about anosmic that I think is very interesting.