Should I Contact A GI Specialist Or A Dermatologist About A Skin Tag And Black Spots Around My Anus, Given My History Of Digestive Issues?

i am 24, female. i have always had digestive issues, and yesterday i noticed i had a bump around the anal area. today i decided to check what it was, and i am fairly sure it is a skin tag. however, i also found a couple of black spots of the skin around my anus. i really dont know if they ve always been there. i know i cant get a diagnosis online, i just want to know if it s something i should call my gi about or if i should look for a dermatologist