Heeellllppp!

[dom]

well i m a newbie to this fantastic hobby.
i have this aba knife fish... a small one...
it was attacking my other fishes so i moved to another tank..
well i dont no if its is a disease, its developed this small white bump on the side of its head...
can u plzz tell me if this is a disease of not...
and if it is how can i treat it?
thnnxxx please if u no anything about it
please reply

p.s. the photos of it are in my album.. plzzz have a look....