How long does it take peroneal nerve to heal after decompression?

perhaps 4 weeks: If involved only myelin coverings, about 4 weeks for recovery. If injury to central axon, regrowth at 0.1mm daily. Emg test may help predict recovery.

Biphasic response: Typically, recovery occurs in two stages, with some initial improvement in the days or weeks after the surgery (as stunned nerves wake back up), followed by months of no real improvement and then finally a second stage of improvement (as regenerating nerve fibers finally grow to reach their targets). The important thing is to keep as active and limber as possible while waiting.