Dani Pedrosa underwent surgery on Tuesday after beginning to develop compartment syndrome - or arm pump - during recent MotoGP races.
The Honda rider had the operation on his right forearm in Barcelona's Quiron Dexeus University Hospital, with regular MotoGP surgeon Dr Xavier Mir carrying it out.
Pedrosa is currently on a streak of eight consecutive podium finishes, but has not won a race since last October's Malaysian Grand Prix.
He trails dominant team-mate Marc Marquez by 28 points in the championship at present.
The surgery should not impact on Pedrosa's participation in the next round of the series at Le Mans on May 18, although he will remain in hospital for 24 hours and his arm will be temporarily immobilised.