@cicerone imposter,
To repeat, C.I....
I didn't mean the slight nosebleed was emotionally traumatic. I'm not using the term to refer to emotional trauma, I'm using it to refer to physical trauma. The medical cause for the nose bleed is minor trauma--any blow to the nose is considered "trauma" to the nose. It's a descriptive medical term to describe causation.
People can also have spontaneous nosebleeds without any trauma. I had one of those once.
And the trauma to Zimmerman's nose was very minor, it wasn't a strong blow to the nose, consequently the injury to his nose was very minor. That's why he required no treatment at all, not that night, and not afterward.
And I think it was caused when he got hit in the nose by his gun, while struggling with Martin over the gun. There's no evidence Martin punched him in the nose, the minor trauma to his nose might have been caused by his gun hitting him in the nose, which could happen in a struggle over a gun.
It's possible that Martin never hit Zimmerman at all.