Purple Discolouration on Ear

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Ive had this purple discolouration on my ear for ~ 2+ months. I have not had any trauma to the ear, i haven't had any piercings or falls either. It is completely asymptomatic, its not painful and I have not had any recent/current ear infections to my knowledge. I am just curious to know what other people think to what it is or how I got it and why it's still there. I am a 21 year old female, i am relatively healthy although I have a few vitamin and mineral deficiencies and currently in the processes of investigating a painful lump of my wrist that was deemed not a ganglion cyst.