fish with hole in forehead

Question
i have a flower horn who is about 9" to 10" i raised him fro a baby he is now about 11 months old he has a lump on his head i was happy at first cause i thought it was his natural lump growing but it has busted in a few spots now it looks like hith diesease or is this the natural process please help

Answer
Hi Tooker,
This is a disease called hole-in-the-head. They usually affect fish such as cichlids, Discus and oscars. It is usually very difficult to treat and the cause in unknown.
Because there may be multiple causes of this disease, the treatment usually consists of taking a multi-faceted approach. The goal is to rid the fish of Hexamita, improve water quality, and improve vitamin/mineral supplementation and nutrition. Use an antibiotic, metronidazole to treat the fish. Meanwhile, daily water changes are a must.

Good luck!
Chloe.