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My fish has a bump on its head. Is it serious? What should I do?

Updated On September 23rd, 2025

Pet's info: Fish | Gold Fish

My fish has a bump on his head I’ve been using Pimafix and meta fix treatments and not sure what to do now

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1 Answer

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on March 15th, 2022

Hi and thanks for your request This is likely due to lymphocystis which a self limiting and resolving lump caused by a viral infection (iridovirus). The lump may take several weeks to disappear but it will eventually and spontaneously. Please check water parameters as they should be kept within normal limits.

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