If mine have the 'daycare drip' ( clear snotty nose) then they go to daycare, playgroup, library etc.
If it's accompanied by fever and luminous green snot then no. Both my kids have hayfever so frequently have a drippy nose for no reason. I do give them antihistamines but sometimes I forget or don't think it's that bad.
wifey of hubby who is always away. mother of two girls who are always amusing.