Scurs are more likely to occur with particular breeds of goats. Alpines in particular are more prone to scurs. Bucks often have more stubborn scurs than does. If scurs, or misshappen horns, start to develop after disbudding, heat up the iron and do the job over again. However, in some cases the scurs are stubborn enough that it becomes a small horn. Here is where you will need to make some judgement calls.
Exceptionally large scurs can lead to standard problems common with horned goats: they can be a danger to humans and other goats. Another problem is that a scur can grow toward the goat's eye. There is a tool called "scur nippers" but because there is blood in the horn, it is not recommended that you try to nip the scur with the exception of the smallest of growths. In some cases you may need to have your veterinarian cut part of it off every so often.