Hello, I hope everyone is well.

My mother has a mole on her lower back and has apparently had it for months, unbeknownst to me. She found out today that it's gone black inside and has blurred boarders, which I understand is a symptom is melanoma. 

She doesn't appear to have any other current symptoms. Is there anyway it could be something else? If not, I'd rather know as my heads been going round in circles for hours. 

Any help is appreciated!