The peroneal nerve is found on the outside part of the lower knee. This nerve is responsible for transmitting impulses to and from the leg, foot, and toes. When damaged, the muscles innervated by the nerve may become weak and sensation may be lost. A condition called foot drop can occur. Foot drop is the inability to raise the foot upwards.

A peroneal nerve injury is commonly caused by an injury to the leg.

Trauma to the nerve can occur with:

  • Broken leg bone
  • Knee injury
  • Surgery to leg or knee
  • Ankle injuries

Peroneal Nerve Damage After Ankle Injury and Repair
Peroneal injury
Neuropathy is nerve damage.
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Prolonged pressure on the nerve can occur with:

  • Sitting position
  • Cast on lower leg, particularly if it is too tight
  • Blood clots, tumors, or other masses