I am a female age 30 and about 6 years ago I noticed a purple bluish undertone to my top shoulder area. It’s got uneven edged and unusual shape but completely flat and almost under my skin looking so to speak. It has been causing me a little tenderness it seems and possibly slowly gotten darker with time. I am getting it assessed next week but I am curious if anyone has had this but me. I am Caucasian and I cannot seem to find anything like it online but sometimes I do see similar things.