Lumps on the pastern?

[Elishandpebbles]

My poor standardbred has a strange, hard lump on his right pastern! It has just randomly popped up out of nowhere it's got no heat at all and he's not lame, infact I've just schooled him for an hour and it never bothered him...I just need some assistance on what to do with it before the vet comes out thanks guys

 

[Hipo]

Splint? Windgall?
I would just cold hose it regularly until the vet comes.

 

[Hipo]

Duh.....pastern.....Windgall?

 

[Penny Eater]

Whereabouts on the pastern? Could be ringbone.