i think it's a normal phase when they discover that little hole that their finger fits so perfectly inside. i wouldn't worry about it.
happily married mama to DD1 4/08, 12/31/09, and DD2 5/11
Appalachian mountain woman, radical homemaker, homeschooler, childbirth educator, and doula loving her DH and three powerful little femmes. Deladis 8-4-05, Ivy 4-28-08, and Gweneth 7-21-12 HBA2C! -
Dr. Sear's recommends gently squeezing and rubbing both sides of the nose from the top to the tip because children often pick their nose because something inside is irritating them. I taught my dd how to do this herself and it helps a lot.
It could be that. Sometimes if it's quite dry that makes it irritable, so we would sometimes moisturize the inside of the nose.
Another thing is it might be a form of self-soothing. It was like that for my DS for a while. So, you might want to try and see if something like stroking a hanky may be useful. Or even twiddling her thumbs.
When she gets older, you can start reminding "bad habit". When DS got to be older, I would sometimes suggest that if he wanted to pick his nose, he go into the bathroom to do it - so others didn't ahev to watch.