Re: Cuts on corners of mouth
There are a couple things it could be from a food related reaction to a viral infection.
First question is, do you eat alot of spicey foods like mexican or italian foods? I used to eat alot of mexican foods for lunch back in college and I would get cankor sores. Never on the outside of my mouth. Always inside my cheeks or gum line but, I have heard of people who get their food related sores on the outside corners of their mouths. Even if you don't eat alot of spicey foods, you may still have a food allergy to something. Do you have alot of tummy aches? Or, a tummy ache once or twice (or more a week)?
It could be a cold sore which I think is the same as a kankor (sp) sore. Get some Abreva. It is in a little blue tube in the pharmacy section of the grocery store. It tends to be expensive but, I have had tubes that last 4 or more years. Anyway, anytime I get a sore (again...mine are only inside my mouth) I use the Abreva and it goes away pretty quickly. So, it is well worth the price tag!
The last thing I hesitate to mention is Herpes. But, before you get weirded out about that word, keep in mind that Herpes doesn't always imply an STD. I don't know enough about Herpes to say how one can get it without it being related to and STD but, I do know that that is a common misconception.
Anyway, you might go for a visit with your dentist or your regular PCP (doctor) and have them run a culture on it to determine what for sure it is. It could just be weather related. You may be chapped in that area. It could be related to the type of toothpaste you use. There are so many different reasons for those sores that it is basically a process of elimination to find out what it is if you try to diagnose it for yourself. But, if you see your doctor, he or she can diagnose it faster and help make you better.
Take care and keep in touch!