sneezing, snot--should I worry?

[Guest guest]

My 1 yr old has no lung issues as of yet and suddenly started

sneezing yesterday. He blows out all kinds of clear snot (pardon

my lack of tact). He is allergic to milk and egg whites that we

know of but could he be allergic to something in the air

suddenly? I had allergies to ragweed and dust as a child but I

am not sneezing now. We live in San Diego and the pollen

counts aren't too bad so should I worry? Can sneezing be a sign

of something? He doesn't have a cold--only sneezing. ANy

advice for a 1st time mom would be great. Should I call the CF

dr?