Sounds like an allergic rxn to me. You might just have to let your eyes rest and not use any eyemakeup, liner, mascara, etc until the dryness goes away and goes back to normal. I don't wanna scare you or anything but wanted to share a similar story. A friend of mine got a HUGE rxn to UDPP and had a similar thing with the dryness at the corners of her eyes and stinging. I told her to take a rest on her eye makeup but she didn't listen and kept using the products. And it got so bad that both her eyes and face swelled up so much like a balloon we had to take her to the ER. So if you use something that stings, burns, irritates, or causes dryness take it as a sign that you are allergic to it. Your skin around your eyes is the most delicate part of your face since the skin is thinner. I hope this problem for you will go away soon and you'll feel better.