Abnormal large lump on goat flank in ~36 hours time. Ideas?

Thanks for the welcome. She also had no detectable entry point. Vet couldn't find it. Thank goodness she is already sold (at a discount), and with a great 4H home. I'm glad I took her to the vet it was a great learning experience for me.

Been a day or two since I've last reported. Posted a couple pics to my journal but want to put them here as well so folks reading this thread later won't be all wondering what happened.

The two sores eventually merged at the top forming like a horseshoe shape. The skin died and peeled off from both areas, and they have dried, scabbed, and are healing themselves from the outsides in. Since there's been no infection, no maggots/fly strike issues, no fever, no erratic behavior, etc, I have let nature take its course without vet intervention. Here's a couple of pics from earlier today:




You can see that the affected area is much smaller now than the original blister was when I drained it. I still have no idea what caused the initial issue. She seems to be doing well.

Ya know, several years back I had a goat that got stuck under some building materials. There was some plywood leaning up against the side of the barn and "somehow" it got knocked over on a wether I was growing out. It happened after I had fed one evening and I didn't find him until the next day so he was under several pieces of plywood for at least 14 hours. He ended up with several pressure sores that did the same thing that your goat is doing. The skin sloughed off in a couple of places but the wounds closed over and the hair grew back and you couldn't even tell anything had happened later. But, my goat didn't have the swelling that PB&J did beforehand. Gotta be glad that they have a pretty good ability to heal!

How big was the exposed area on your wether FEM? This is now about 1/2 the original size it was when it was first "blown up" and filled with blood. The first/major area on the lower left is maybe 2-2.5" across now. It was originally well over 4" when blown up.

He had two areas. One was on his shoulder and the other on the hip area. It was where the pressure of the materials laying on him impeded circulation. The spot on his shoulder was the biggest. At least 4 inches wide and about 6 inches tall...football shaped...the one on his hip only about half that size. He didn't have a hematoma though. Those two areas were cold to the touch when I found him. The skin sloughed off and he healed pretty quickly. Looked a lot like your doe when healing. The skin filled in, grew hair and he went on to be a nice meal.