The peroneal nerve controls the muscles that lift your foot. This nerve is quite exposed to trauma where it runs just under the skin on the outer side of the knee. Activities that compress this nerve can increase your risk of foot drop. Examples include:
- Crossing the legs. People who habitually cross their legs can compress the peroneal nerve on their uppermost leg, particularly if they are slim.
- Prolonged kneeling. Occupations that involve prolonged squatting or kneeling can result in temporary foot drop.
- Wearing a leg cast. Plaster casts that enclose the ankle and end just below the knee can exert pressure on the peroneal nerve and cause foot drop.