I Have A Reddish-purple Burn/bruise Looking Mark On My Right

I have a reddish-purple burn/bruise looking mark on my right earlobe. I know for a fact that it is not a burn/bruise/hickey or anything of the sort. It is not bothersome or painful in anyway. I am an 18 year old female. I want to know whether or not it is something I should be concerned about. I can not afford to go to the doctor for something that is nothing at all.