Road rash healing too tight?

On the inside of my arm, basically right on top of the bicep and close to the inside of my elbow, I got some pretty bad road rash. It's healing up nicely, but too tight - when I try to extend my arm all the way the skin begins to stretch and almost tear in one place. What can I do to prevent this and make it heal properly? The original injury wasn't bad enough to warrant a doctor visit, but now that the scabs have healed and are beginning to flake off I'm mildly concerned about the new skin on my arm.