It could symbolize emotional trama.

Maybe symbolism is tantamount to beauty, as it is perceived, interpreted, and decided by the beholder. The Thinker, a sculpture by Rodin, could be interpreted as a poet, a man thinking, or someone resting their chin. In creating the mask, you are the artist and what you want the scar to symbolize, may or may not be the same as the viewer interprets it to be. A scar is generally evidence of a past injury, and the healing process creates a mark on the body called a scar. Logically, the greater the size of the defacement probably correlates to the magnitude of the injury. A large ugly scar is certainly suggestive of pain and trauma.

pain, endurance, life (past history), strength ??