Dry crust on the corners of nose?

So the story is i was with my friend and we were swimming at a lake and after i got out the corners of my nose were irritated and red and stung, as well as a small area at the corner of my mouth. that was about 5 days ago now the areas are still read and develop a dry crust after a while, and with water i can sorta scrub it off and it is still red. the crust kind of looks like dry skin but comes off with water. It could be dry skin i don't know. It is sort of like when you have a cold and your nostrils get red and irritated but also on a spot by my mouth and high up on the corners of my nose. I use a facial cleanser kind of thing and a spf 15 moisturizer on my face once or twice a day, and the moisturizer irritates it. It is sooooo annoying. Does anyone know what this is and or how to get rid of it? Please help!!!