Does anyone know what this could be??

Lexi • 19 years old/ Insta: lexihedlof
I've had this for 3 years. It doesn't bother me, sometimes it itches but that's it. It used to be super tiny. But it keeps growing. My Dr said it's probably nothing n have me this special lotion for it. But I still feel like it's something. My mom said it's probably nothing serious bc it doesn't hurt or bother me. But any ideas??

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