for over two months i have red sore lips upper & lower,,i use vasaline on them daily,,it is very hard to eat or drink, i went to my dermatologist and they did not know what the problem was & they froze it...they did the same thing 3 years ago and within 2 weeks it healed up,,now its been over a month,,still just as bad,,next step they want to do a biopsy,,but they really dont know what the problem is,,can you help,,,thanks janet