Trevor's right arm will cause him chronic pain for the rest of his life, interspaced with moments of total numbness where he cannot use it at all.
Tremors and shakes in his arm become common and hit randomly, with little warning.
His fingers don't grip as well as they used to, fine motor skills in that hand suffer inevitably.
What writing skills he did have become worse until he start use his left hand more and more.
The pain can, when he's tired or stressed, travel to the rest of his body. There are days - rare, but they happen - when he cannot leave his bed simply because it hurts too much to move.
However he still, stubborn as ever, refuses to allow it to stop him. He still works, helps with construction, with defending the new village from the night creatures that still lurk about.
