My child get running nose when goes to school?

my kid saryu 4 years her health is good until she doesn't go to school,when i join her to LKG she gets running nose,doctor gave treatment after that,during holidays she is good.Again when she started going to school and gets running nose what is this problem what i have to do i much worried about her.when she is going to school only she gets the running nose what disease it is.My child get running nose when goes to school?It's all that asbestos in these old schools. America's stupid, man.My child get running nose when goes to school?Has she been checked for allergies? Perhaps she's allergic to something on other children's clothing?My child get running nose when goes to school?ask if he is getting bullied