Unhappy Cristiano Ronaldo seen using an iPhone to check his face full of blood after suffering nasty injury (Details, pics)

Cristiano Ronaldo faced off with a cleat and won a goal, but lost some skin in the process -- which seemed to piss him off after a quick mirror check on the nearest phone available.

The Real Madrid striker suffered a nasty injury Sunday in the final few minutes of his team's match against Deportivo -- going in for a header, and scoring the goal... but walking away with a bloody face from a cut near his eye.

As he walked off the pitch, Ronaldo used a team medical's phone to check out the damage to his second crown jewel (feet first, of course) -- and couldn't help but look annoyed.

He certainly paid the price for Real Madrid's 6-1 lead in the 84th minute. But hey, the goal itself looked pretty sick... for whatever that's worth.

Real Madrid later won the game with seven goals to one after the 90th minutes.