running nose

It's perfectyly normal, don't worry about it too much. Maybe it's because of the cold water or the chlorine of the swimming pool.

We also have the same problem. I am not a smoker. So I guess that its not about being a smoker or not. I think its because of prolonged exposure to cold water.

Oh the same thing happens to everyone! Its just your nose trying to stop the germs (and viruses,poo and pee!) getting into your body. Its perfectly normal so don't worry! ~~drakan291~~

If you swim in a sanitized swimming pool, the disinfector in it could be a kind of allergen to your nose. And smokers are very likely to get their noses more and more sensitive to the environment. It could be also caused by another fact that you have not adapted yourself to breathing in water. When water flows through your nose while you breathe, you feel like your nose is running.