Yes, she's pastured with two other horses so we are pretty sure it's from a kick. I've done a lot of research on it and there's websites that say that they will eventually go away on their own and they say to walk the horse, message it, apply heat. And there's others that say you can either leave it alone, do the things mentioned before, or call the vet and have them drain it. I've read that sometimes it's better to leave it alone because having a vet lance it to drain it opens it up to infection and that that can be worse than having it swollen like that and letting it just absorb on its own in time.
I'll be calling the vet out though and see what she says about what would be best to do. But I thought it'd be good to see what others have experienced and to see if there are any opinions, thoughts, or advice on what to do and what those did who have had to deal with one before.