Hi,
I have been having those painful sensation on my palm when I write with my palm resting on the journal edge.
Then I realized it could be paper cuts, There is even a wiki on it.
http://en.wikipedia.org/wiki/Paper_cutAlthough a loose paper sheet is usually too soft to cut, it can be very thin (sometimes as thin as a razor edge), being then able to exert high levels of pressure, enough to cut the skin. Paper cuts are most often caused by paper sheets that are strongly fastened together (such as brand new paper out of a ream), because one single paper sheet might be dislocated from the rest. Thus all the other sheets are holding this dislocated sheet in position, and the very small part held away from the rest can be stiff enough to act as a razor.
I am more careful now. Especially with my Clairefontaine journal. I even run a nail file just to make sure there are no sharp edges to bother me.
Rdgs
James