Its hard to see in the picture, but the first thing that comes to my mind is a Hematoma which is a blood filled sac normally caused by trauma.
I see it quite often in dogs such as cocker spaniels with bad ear infections that have scratched and shook there head so much that the ears are slapping against the head until they cause the internal bleeding that bubbles up as a hematoma. They will usually go down on there own, but with dogs its best to lance them because as the blood dries up it causes the ear leather to draw up with it and causes the ear to always have a shrunk wrinkled area.
I don't know what the difference is with the mares but I would call the vet back and ask more questions.
Hi Jo Angela. Thanks for responding to my post. After I posted, I looked up "Seroma" (the correct spelling), in a book my friend lent me, called "The Horse Doctor Is In" by Brent Kelly, DVM. It said that Seroma is pretty much the same as a Hematoma, but instead of blood that leaks from blood vessels and tissues,it's serum. It is caused due to trauma. The author says that most times it will resolve itself as the body reabsorbs the fluid. The author didn't reccomend lancing it because if the leaking vessel hasn't healed yet, then the fluid would just keep coming out. He reccomended cold hosing or placing cold packs on them. My vet is coming out tomorrow to look at it. I'll let you know what he says. Thanks again for your response. I'll post some more pics tomorrow when I get home from work.
Jo Angela, my vet was out today and looked at my mare and said it was an abcess, and that she is starting to get one on the other side of her vulva also. He said he doesn't know how she got it, but to hot pack it if she'll let me, using a wash cloth and some warm epson salt water. This is just so weird. Have you, or anyone else that might read this post, ever have their mare get abcesses around the side of their vulva a few days after giving birth?
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