Olfactory devices and methods for partially or completely blocking, masking or otherwise reducing olfactory input to mitigate adverse responses thereto. In one embodiment, a method of treating a patient with an olfactory-triggered condition may include diagnosing the patient's olfactory-triggered condition. In response to the diagnosis, the method may further include placing an olfactory device over an olfactory area in a nasal cavity of the patient to mitigate the olfactory-triggered condition.