My son has constant nose itch. he has been through 2 rounds of allergy shot to pin point allergies...told he doesn't really have any. but it is someth

Irritant response: There are many agents in the air we breathe that will irritate the nasal passages. Most understand if you are near smokers the smell & smoke can make you sneeze. Add cleaning fumes, dust, perfume, cooking odors, etc.& you may understand how these can make your nose itch & drain the same as allergies. There are some nasal sprays that can help, but you can also try to remove the irritants from the air.