why does my rabbit have a runny nose?

i just got a 3 month old bunny at the pet shop today but later today i noticed she had a runny nose. and i noticed yesterday she had a little bit of a runny nose. like i thought she licked her nose but i now realize it was probable her nose. she did have bedding were she was at but i don know what kind. and she acts Perfect fine and she jumps and scratches and her eyes are not watery. but her nose is watery. and it really does look like water. no boogers or sneezing. just thin clear water like runny nose. does any one know what is is and how do you cure it? thank you