Something is wrong with my goldfish?!

[Karolec01]

The story start at the last week, My fish trying to hurt himself for no reason. He doesn’t eat anymore since 3 days. Please help

 

[Aiken Drum]

Please take a read through the "unhealthy fish" sticky and give as much detail as you are able. If you dont know the answer, say i dont know rather than skipping the question. Where numbers are asked for, give numbers rather than using words like "fine" or "good".

https://www.aquariumadvice.com/forums/f17/before-posting-about-unhealthy-fish-read-this-32451.html

How exactly is the fish trying to hurt itself? Jumping from the tank? Crashing into the side of the aquarium etc?

 

[Andy Sager]

The story start at the last week, My fish trying to hurt himself for no reason. He doesn’t eat anymore since 3 days. Please help

As Aiken said, there is a list of things that need to be known to better help you and you fish. There is also a book at this link: https://pdfcoffee.com/handbook-of-fish-diseases-smaller-sizepdf-pdf-free.html that you can download that has an excellent diagnostic flow chart that can speed up the diagnosis. It uses a simple " If this, follow Yes or No arrows" to come to a diagnosis.

Hope this helps.