I fell asleep nursing my 8mth old, so my boob was left hanging out and I woke up with a painful red mark near my nipple. I assumed she may have tried re latching and at some point in the night and just missed the mark 😂 but it started getting bigger and hurting. I'm pretty sure it's a spider bite i peeled a bunch of dead skin off of it and poked it and pus came out. It hurts when I nurse on that side.  I normally don't sleep nurse but I was visiting friends and i forgot my pack n play so I co-slept.