hello, I would like to suggest a way to get rid of your lip problem, I don't know if it will stay away so you may have to keep using it - but it has worked for a frined of mine with psoriasis, and then with me when I got something that looked like what you have, except above my belly.
There is a product called Miracle II, I suggest u buy the small sampler pack since you may try it out first - and it has enough to see if it works for you.
First use their "soap" to clean it, please, do not use chlorinated water on your wound, use distilled water.
Second you let it air dry (and never use toilet paper on your lips - anywhere for that matter - if you want to wipe after using the toilet then get a jar with a cover, get a sponge and fill up the jar half way with hydrogen peroxide. just squeeze out the liquid and wipe - change as needed.)
Third you take the Miracle II "Gel" and smear it on.
Forth you take Aloe Vera clear gel (not the green gel, it will irritate open wounds). Put the clear aloe gel on just before the Miracle II "Gel" is dried.
leave it alone. You can do this in the morning and evening, and expect results within 3 days, maybe it will be gone within a week!