Hi, I have a flat white patch on my lower lip that is off to the side. It's irregular shape, but has a defined border. It's not raised, nor does it hurt. Through looking at past pictures of myself, it's seem to have been there for a couple months, but looking like it's more pronounced now as I just noticed it two weeks ago. Seems like it appeared when my lips were chapped from dry wind and sunshine since I'm outdoors a good amount in sports and activity. My lips are always dry and I am always applying chapstick and licking my lips. I do not smoke. I drink alcohol once a week. I am in my early 30s. It looks like it will turn into dead skin and I can peal it off, but it hasn't peeled. What could this be?? Thank you!!