✔ 最佳答案
The adjective being runny or running.
If you mean to say that your nose is running around with little legs then say 'running nose' but if you want to say you have the sniffles say 'runny nose'.
Can you see the difference? The people who use 'running nose' for sniffles are incorrect.
參考: Two and a half years studying communication and journalism at university!