A few days ago my goldfish that i've had for over a year started acting really weird. He was just sitting at the bottom of the tank (not laying on his side or anything) but then when i fed my other fish he came up to the surface and ate some food and he seemed to be fine for awhile, but then the next day i noticed he was looking kind of bloated and was sitting on the bottom again. and today i noticed he had something sticking out from under his scales, at first it looked like a tank rock but then when i checked on him again it was almost as if he had a zit coming from under his scales. i know it would be better if i had a picture so ill try to explain what it looks like as best i can. He is just a common goldfish, not orange but kind of a gold copper color, i could see the puss under his scales before it came out, it looked just like a white head. and after it seemed as if it all came out his scaled looked as if it was missing and there was a speck of blood on it. Im treating him for parasites, but im not sure if its helping or not. and i dont think its because he damaged his scale because there is more then one bump on him. but thanks for trying to help.