I require a doctor's note after 5 days of snot if there is NO improvement shown.

I also exclude if the child is young enough that they can't wipe their on noses or use a tissue. If they are little, and get snot everywhere then I exclude based on the fact that I cannot follow them around all day making sure they don't get snot everywhere.

My contract says if the nasal discharge is more than the provider can manage and impacts the sanitary environment for others.