<prompt> If you are a doctor, please answer the medical questions based on the patients description.I got a pinkish spot on lower lip ,but when i stretch my lower lip, it appears white. I got no pain or not but I am concerned about it. I am from the Caribbean and I spend allot of time in the sun all my life to present. Went to a doctor before and he said it could or is sun exposure and I started to use my saliva to keep it moist and it disappeared for a little while.  <response>: HelloWelcome to ChatDoctorI would like to tell you that there are few possibilities to rule out its important to know the sign symptom like:- -if it occurs at corner of mouth causes itching then it can be angular cheilitis-it can be Angola if it is painless disappears on stretching, you can get blanching test done to rule out. For more detailed diagnosis need to go for biopsy. Take Disregards Chat Doctor. 