Triple H announced via Twitter that he has 2nd degree burns from dry ice that stuck to his torso and arms.
Prior to his enterance at Wrestlemania 29, he doused himself in water which then froze when it came in contact with CO2 gas.
Triple H included the above picture of his injuries with his caption:
For those wondering… Stuff stuck to me at mania was dry ice. Gave me 2nd degree burns on torso & arms