I'm glad you have said that. I have been doing loads of research and seems that treatment can sometimes make them a whole lot worse! I am going to keep an eye on them and ask the vet next time he's out.
Thanks :)
These lumps are on the inside hind leg and are about the size of a pea. Do they look like they could be sarcoids?
http://www.horseandhound.co.uk/forums/picture.php?albumid=5228&pictureid=19192
http://www.horseandhound.co.uk/forums/picture.php?albumid=5228&pictureid=19191