Tiger Oscar hole in head?

[CPfish]

Have you tested your water?

Yes

If yes, what is your ammonia?

0

If yes, what is your nitrite?

10ppm

If yes, what is your nitrate?

10ppm

If I did not test my water...

1. ...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.

Do you do water changes?

Yes

What percentage of water do you change?

51-60%

How frequently do you change your water?

Every week

If I do not change my water...

1. ...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.

Is this normal for the head and lateral lines, or beginning of hole in the head disease? 50% Water change every week.

 

[kno4te]

Looks like normal pitting. Don’t see any hith.

 

[duanes]

I edited your pic to get a closer look.

Could be normal cephalic pits, or could be the start of HITH
Since you don't say the size of your tank a 50% water change of ? is hard to judge.
In a 200 gal gal tank, 50% may be adequate, but
in a 100 gal or less, a 50% water change might not be enough to stave off chronic disease like HITH.
On my 300 gal system I try to do over 100% per week.