I have a success story to share. About 7 months ago my oscar came down with a bad case of HITH, all of his sensory glands and spots on the lateral line had gaping holes that were only getting worse. I thought my fish was going to die, even though I was trying to medicate him with melafix and constant water changes.
I almost lost hope, but then I found "Hole-n-head guard" by Jungle. I was worried at first when using it, watching white particles hang onto the open sores, covering the fish.. but after about a month or two, I noticed all the holes start closing up. Now, after about 3 months, they look like they've been injured in the past, but they are closing up and the fish is acting a lot healthier.
I recommend using Hole-n-head guard to cure your fish! Maybe it was something else that did it, but either way. give it a try! Just remember to do exactly what it says on the bottle. My fish is healthy and about a foot long now, I remember posting on here when he was only an inch!
I didn't know there was a treatment directly for hole in head ...