Hole in the head?

[pvn11]

i was busy for the past two weeks so i skipped water change but when i did change the water today i noticed one of my discus was in quite a bad shape and idk what to do , others seem fine but this one is not fine, he's still eating but not active

[pvn11]

i started treating it for everything, i did a pp treatment and started metro aswell

https://youtube.com/shorts/nI1qvAyUKPo?si=7kd9Ya-9X4x91J88

[danotaylor]

I’m not sure the erosions in the head are HITH though I see discus pimples on his side which can lead to HITH when on the forehead area.

This looks almost like trauma, like it rammed its forehead into something & damaged the mucosa;
IMG_6399.jpg

What is your nitrate level typically on water change day?

Discus pimples are a sign of poor water quality. Missing 1 exchange probably wouldn’t be the sole cause unless your nitrates were already on the high side.

Clean water w salt @ 1tbsp/2gal and pure metro is the treatment for HITH.

PP will irritate the crap out of the mucosa and the fish is already stressed.

Hopefully others will chime in here soon as well