First BP, I need help

[BattleWhale]

So I got my first Ball Python about half a year ago, her name being Mia. She's technically not my snake, she's my brother's, but I love her despite that. Anyway, I don't know how long ago, but at some point, awhile ago, she got some horrible looking wounds on the bottom of her body. IDK how to describe it, and I never got a picture of it, but it looked somewhat like this(as in the nubs)
Today, she still has scabs of the wound, and it doesn't look good. The top half of her shed over 3 weeks ago, but her tail and lower body, where the wounds are, hasn't shed. My brother never seemed worried, so we never took her to the vet, but now, I don't know. Here are some pictures that will hopefully seem familiar to someone.
Her whole lower body:


Where the shedding stopped:



Her tail(which the very end has already fallen off):



The wound where it has shed:



To sum it up, I have no clue what happened to her, and don't know what to do. Should I take her to the vet, use a warm wet cloth to try and get it off, pamper her with Neosporin and hope for the best, or...? Thanks in Advance