My mouth is chapped and it's itchy?

Use a cotton ball and some water (regular water works the best) lightly rub back and forth on your lips to make them moist. Chap-stick has a very high source of chemicals in it which makes it sting. The chemicals are to protect your lips, it may give a sting but it helps after a while. I also suggest that you do not use the sugar scrubs anymore it will just make it worse.