Well know affliction of a Barista's wrist who still use the old fashion
coffee/espresso machines due to the repeated motion of twisting the filter
handle on and off on the group heads. The pain is similar to carpal tunnel but does dissapeat after a while. Prevalent in newbee Baristas in training. Was alleviated a bit with the invention of the right angled version and
now eliminated with the arrival of fully electronic espresso machines.