The clawmark neck scars are from a duel, the shoulder scar is from a rogue blast of another dragon's fire, the arm scars are from her time in combat school (a common school for dragons since they're dragons), the leg scars are from being tripped in a training battle by her opponent, and the wing tears are from her nestmate in a (lawless and one-sided) fight
It's pretty rough, but the dragon's one of my first OCs named FireBurst and she's been through a lot of overhauling between 2021 - the present day, but the scars I drew all have stories I'm still working on, scars in dragon culture are significant things and not supposed to be shameful, to another dragon it shows how much someone has survived