Why does the outside of my nose itch, drives me nuts.

I have allergies too, I'm allergic to mold, dust mites, cock roaches and some fir trees. I was tested when I visited a allergist. But why does my nose on the outside sometime itch so bad I go nuts. When I wake in the morning my nasal passages start to kinda burn and then my outer nose skin starts the itchiness and then the sneezing or mostly runny nose, constant blowing. I have this all year long, it's really bad now that it's spring.
Anyone else's nose itch on the outside, the whole nose?

Is it a cortisoid cream, cause my nose swells also.

My nose simple itches all the time on the outside (feels like it could have been a mosquito by) but there no bite marks or any marks of any kind