Jup, the lumps are in fact just dots of hair that are a bit longer. He got bitten by a fox and the fur that has grown back was a bit lighter and longer. Guess it will disappear after his spring shedding.
@elbrant Yes, she's good an patient sometimes, I've been taking pics of her from day 1 so she's used to it, I'm allowed a couple of mins and no more though.