i think my gold fish is dieing he has like a red bloody spot on his head and

Probably ammonia burns. How often do you change the water? And how large is your tank? Those are probably the two problems right there.
 
That happened to my goldfish after I had him for six years. It would go away and come back again once and awhile. One day it looked really bad, but he lived 3 years after that. Hope he gets better=] They make stuff at pet stores for red spots on eyes and tails, that can be like fungus I think. Or it's like bacteria. Go to a pet store they can help, and it can go away on it's own. That happened for my fish.
 
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