It's important to treat the problem now to avoid further splints. Yes, these bumps can be treated. No, I don't believe many of them work the way they are advertised to work. Anyway, the way to treat the problem is to treat the inflammation. I'd continue the treatment until the splint is no longer hot to the touch and not very tender.
Some people like to hand-massage the area daily once it is no longer warm, then wrap it.
Injecting the area with corticosteroids is also done, and applying a solution of DMSO and steroid can help to reduce the swelling. But it is going to take a bit of time. No, there is no shot or ointment to make it go away quickly, but the cold and wrapping that you do immediately can greatly reduce the size of the splint and keep a small problem from becoming a larger one later. I'm glad that I could answer your questions. I'm sure that it was quite a shock to see that lump and you were very concerned, but please don't give anyone else my cell phone number.