My fish has a wierd thing on his head?

Question

its a golfish and it has a red circle on his head above the eyes.

i have 2 other goldfish and 2 alge eaters they suck alge from the tank. my dad thinks mabye one of the sucker fish stuck to him and the red is his under skin please help anything u know please and thankyou it also seems to be active and lively not like its hurt or anything

Answer 1

this is mosst likely to be a bacterial infection, use a broad spectrum anti bacterial treatment and check the water quality.

its habitat probably aint quiet right and this has stressed it and allowed a disease to gain a foothold. the tank shouldnt get too warm for goldfish say 22c absolute max.  also check ammonia nitrite and nitrate levels. do a 25% water change (never all the water) every week or 2 to help keep  and waste products down that have dissolved in the water. a well looked after goldfish should live for about 30 years.

Answer 2

it doesnt sound lik there is anything really wrong. if it upsets you that much. take that one fish and flush it.

Answer 3

it could be a parasite sounds like it. but I just don't know. you might go to your local pet store and talk to them about it and maybe get something for parasites