WWE.com has posted a story noting that Triple H suffered some sort of left arm injury during his No Holds Barred Match against Brock Lesnar at WrestleMania, and had to have an x-ray performed on the arm after the PPV last night.
The x-ray results came back negative, and HHH was diagnosed with a muscle contusion. You can view footage of HHH getting the x-ray at the above link.