its your ourys dude...
i had the same problems... when your riding for long periods of time the extra cush in the ourys settle in on your nerves in and around the palms. they are great for the padding, but it works like a double edged sword. theyre designed for mountain riding. the second i switched to bmx grips, the problem went away. hand positions are nice, but if you like the aggressive feel and practicality of risers then switch out those mf'n ourys!