What could cause a scar like this?

I don't know where this would really be in so sorry if it's in the wrong category.

My mare has this scar, I was wondering what could cause it?

How long have you had her? Has it always been there? It looks like it was possibly from a halter or a nose band rubbing.

This x-mas eve will be 6 years. She's had this before I had her, and before her old owners had her.

To me it looks like a nylon halter got to tight when she was being broke. But it could be from rubbing on fence or tree, maybe?

Thank you. I just find it odd because she isn't.. touchy about halters, or anything, plus it's the only scarring she has on her face. I've just always wondered about it.

Thank you though for responding. :)

Some fool left the halter on her while she was growing. This summer I rode a real nice blue roan gelding that had the halter left on him so long that it caused a hole in his nose right into the nasal passage.

That's why I HATE to see people leave the halters on thier horses for ANY reason.

It's a pressure scar from probably a halter being too tight. However you can just say that's she has a geometrical blaze & that's she really exotic.

Halter put on when she was a baby then just left.

Agree with the others; a halter put on and left until it probably had to be cut off her face.

Yup, a sign of really bad abuse. Sadly, not an uncommon thing to find in many rescue horses.