Hey, everyone. My quarter/percheron mare started limping with her left hind leg about a week ago. I checked her hoof and saw nothing stuck in it. I noticed there was swollen spot about the size of a golf ball(it wasn't sticking out that far just that big of area that was swollen out about a half an inch) on the hair line above the coronary band. Theres no sign of a wound of any sort near the swollen area. If I put pressure on the swollen spot, the horse would move her foot. And the spot was hot compared to the rest of the leg. I just want to know what might be wrong and how maybe I could fix it myself. I would appreciate any help from anyone. Thank you.