I have an altered sense of smell and daily headache?

Polyps? Allergy sufferers that have headaches and altered sense of smell (or no smell) can often be found to have nasal or sinus polyps. Polyps are benign tissue growths in the nose and sinuses and can alter normal drainage pathways. This can lead to headaches, sinus infections, and loss of smell and taste. Though they can be treated medically, surgery is also sometimes required.