DD has started coughing a lot (dry cough) over the last week, but seemed very happy, sleeping and eating the same, so I decided it was just that phase I've heard about.
However I've noticed that she often wriggles her nose, as if it's really itchy. She also has been sneezing more often than usual, and today she doesn't seem quite as cheerful, and her eyes look a little tired.
I'm thinking allergies, but we have no indoor pets, I vacuum very frequently, her sheets are clean..
I'm highly allergic, so if it was a dust thing, I'd be the one reacting first.

I guess I'm asking:

What's causing this itchy nose, cough, and sneezing?