HELP!!! Naso is infected with something NASTY!

[FishNutzBoi]

I came home today and my newly added Naso (4 days ago) has something really nasty on its head. When I first added it, that patch was just a black area. I thought it was just a stress mark. Last night the patch still looked black but darker (i think). Today, that patch "puffed" up and it looks like bubbles are under the fish's skin.

Here are some pictures:

What is this disease? How can I treat him? :eek2:

TIA!!!

 

[dalejr_802]

uhhh that really look nasty but i dont kno wat it is. but i read i topic about this and his tang end up dieyin it starts with the same thing that u said wiht a black/brown line

 

[miracles38]

Try wetwebmedia.com