Why ca'nt i smell antyhing after constantly blowing my nose?

Inflammation: Allergies or viral illnesses will cause you to need to blow your nose a lot. They can also cause inflammation that will affect your sense of smell. Viral illness will likely go away within 10 days, but can cause long lasting damage to your smell (not common). Allergies may need medical treatment with tablets or nasal sprays. See a doctor if the small does not return after other symptoms resolv.