My bearded dragon, Charlie, got very stressed out when we were taking things out of his tank to be cleaned. He first hissed at us, then ran full tilt across his tank and hit his face on the glass. It's now about a week past the indecent, and now his scales are all dark and deformed right where he hit the tank. He's acting normally, and I don't think it's painful for him, but I would like to know if they will ever heal.