Puppy scabs or something?

Hi, this is about my 2 month old border collie puppy again!

We've been trying to potty train her and stuff outside the best we can, but we make sure to clean her up when she gets inside, This cleaning requires just a thorough examination, and I just brush off and dirt I see on her. Well, recently, I noticed a couple scabs on her. One under her armpit, the other around her right thigh region (that little nook between her belly and thigh). There are no red bumps, and they don't seem to be severely bugging her or anything, they're just there. Next, since she was spayed, she's been (i'm guessing), trying to scratch her wound with her back legs, but she severely missed and ended up repeatedly scratching around her upper stomach area. We noticed that this area started becoming irritated, red, and had little red spots (possibly where her nails broke the skin a bit), so we put a stretchy long bandaid on her (like the type you wrap around your hand and whatnot), so she couldn't scratch it. Well it's no longer red and irritated, now all that's left is the red spots becoming a slight yellow color or something? I dunno what color it is exactly, it seems yellow, could be a tint of green, maybe a really light brown, who knows. Is this normal? Is that just her wound healing? She still scratches it from time to time but it's staying the same color, not red or anything. I searched up mange, but got super creeped out and I'm hoping it's not that. She isn't having any hair loss or anything!

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