Flowerhorn has scratch type mark on head

[Sauvik Patra]

Plz let me know is this a disease(attached photo). I found it on internet while finding about the issue. Mine is having this type of marks on it's head.
Plz suggest me what to do.

 

[Charney]

sorry picture did not post. tank parameters?

 

[Mohith Rajeek]

Plz let me know is this a disease(attached photo). I found it on internet while finding about the issue. Mine is having this type of marks on it's head.
Plz suggest me what to do.

Post the pic mate