Hi - I don't know if this is a medical condition, but it is starting to worry me.

At the start of the year, Cait started sniffing her fingers. Every now and then running them under her nose. I asked her about it and she said she didn't realise she was doing it.

Now she does it a lot more and sometimes has both hands at her nose while I'm talking to her like it is a natural thing to do.

I separated from her father in 2007 and there was nothing like this in 2008, it just started at the beginning of the year.

She's not a nervous girl or anything and things are pretty normal around here. Her father and I get on well, there is no tension or anything.

What do you think is causing it ? Is it a problem ? Should I take her to someone ? I was thinking about asking her teacher if she does it at school.