<s>[INST] I m a 57 yr old female, 5 6 , 140 lbs. Have never had any health issues, and am seldom sick. I have a brown tint to my hard and soft palate and a yellow spot on the throat part behind my last bottom tooth. What could this be. The brown tint has been there for 3 yrs or more but I just noticed the yellow spot. Thank you [/INST] thanks for your query, i have gone through your query. the brown discoloration could be a normal melanin pigmentation or it can be ectopic eruption of sebaceous glands(fordyces spots) or secondary to smoking habit(if you have). nothing to worry it will not harm you. i hope my answer will help you. take care. </s>