It is very tough to leave the lips alone. I'm on leave from my job right now in order to heal this. Luckily I am in a good financial position, and am taking college courses online. I honestly don't know if I could leave my lips alone and be in public on a regular basis. I do hang out with close friends every now and then though. One of the things that I find the hardest is laughing, smiling, and eating. It tends to stretch the crust and cause it to come off earlier if you aren't careful. My advice is to gently apply a natural moisturizer throughout the day. Great respect for you being able to do this in public btw. I think the crusts turn yellow from food contact, or maybe dirt in the air.