I am an 18 year old female and I have a purple-ish colored bruise that looks like a hickey on my shoulder blade. I know that it is not a hickey because I have not had any kind of relation like that and I definitely cannot reach it. I have not been in the sun so it's probably not sun related and it does not hurt or itch like a rash. I do not even feel it at all but this is the third one I have had in the last month and it is concerning me. Does anyone have an answer?