Scabs

There's a patch of skin on my left leg that I scratched a lot late last year. I say it's because of mosquito bites, but I wonder why I still can't leave it alone and why it's taking longer to heal than anything else.

Maybe it's age, I tell myself; maybe you're past being a child with magical super healing skin, when your wounds hurt only a little while.

Why else would something take longer to heal than you thought it would?