Join Date: Sep 2009
Location: Tampa Bay area, FL
No, I don't believe so. A hematoma is basically a bruise, but there was just so much blood that it had nowhere to disipaite, and so a membrane forms around it, creating a lump. In humans, hematomas can often just dissolve over time if its in an area of high blood traffic, or they can harden and become a fiberous mass like sara mentioned.
Treatment is often as simple as having a doctor remove the extra fluid with a syringe. Again, this is all in humans. I don't know if you mentioned this in the OP, but have you consulted a vet about your horses treatment?