Foot drop is a condition where you lose the ability to lift the front part of your foot, causing it to drag on the ground when you walk. It’s not a disease on its own but rather a sign of an underlying problem with the nerves, muscles, or spine that control movement in your lower leg. Foot drop can affect one or both feet, and depending on the cause, it may be temporary or permanent.
What Foot Drop Looks and Feels Like
The hallmark sign is difficulty lifting your toes and the ball of your foot off the ground. When you walk, your foot may slap down with each step because you can’t control its descent. To compensate, most people with foot drop instinctively lift their knee higher than normal, almost like they’re climbing stairs. This pattern is called steppage gait, and it’s often the first thing that tips people off that something is wrong.
Beyond the walking changes, you may notice numbness or tingling on the top of your foot, along your shin, or across your toes. Over time, if the muscles that lift the foot aren’t being used, they can visibly shrink. Some people also find that their foot feels “floppy” or loose at the ankle, making it harder to keep stable on uneven ground.
What Causes It
Foot drop happens when the muscles that pull your foot upward become weak or paralyzed. The most common culprit is damage to the peroneal nerve, which runs along the outside of your leg just below the knee. This nerve is surprisingly close to the skin’s surface there, making it vulnerable to compression or injury.
Crossing your legs habitually, wearing a tight leg cast, or spending long periods in one position (during surgery or a hospital stay, for example) can compress the peroneal nerve enough to cause foot drop. Direct trauma to the knee or outer leg is another frequent trigger.
Spinal conditions also account for a significant number of cases. Herniated discs, spinal stenosis, and other problems in the lower back can pinch the nerve roots that eventually become the peroneal nerve. Neurological conditions like stroke, multiple sclerosis, and certain types of muscular dystrophy can all produce foot drop as well. In some cases, diabetes-related nerve damage is the underlying cause.
How It’s Diagnosed
Diagnosis usually starts with a physical exam. Your doctor will watch you walk, test the strength of the muscles in your lower leg, and check for numbness along your shin and the top of your foot. In many cases, the diagnosis is straightforward from these observations alone.
To pinpoint where the nerve damage is and how severe it is, electrical testing is often the next step. Electromyography (EMG) and nerve conduction studies measure how well electrical signals travel through your nerves and into your muscles. These tests can feel uncomfortable, involving small needles and mild electrical pulses, but they give a clear picture of which nerves are affected and whether the damage is partial or complete. Imaging like MRI may be ordered if a spinal problem or structural issue is suspected.
For closed injuries (where there’s no open wound), doctors typically confirm the problem with electrical studies three to four weeks after the injury occurs. If there are no signs of recovery on repeat testing at 12 weeks, that’s usually when surgical treatment enters the conversation.
Braces and Orthotics
An ankle-foot orthosis, or AFO, is the most common first-line treatment. It’s a lightweight brace that holds your foot at a neutral angle so it doesn’t drag during walking. The brace provides ground clearance during the swing phase of your step and keeps your heel in proper contact with the ground when you’re standing.
Several types exist, and the right one depends on your situation. A solid ankle AFO locks the ankle in place entirely, which works well for people who need maximum stability. A posterior leaf spring design is thinner and more flexible, with a spring-like quality at the ankle that allows slight movement and a more natural push-off. Hinged versions permit some up-and-down ankle motion, making it easier to walk on uneven surfaces or climb stairs. Carbon fiber models are lighter and more energy-efficient than standard plastic, storing and releasing energy with each step.
Some newer designs, like the UD-Flex, hold the foot at a consistent 5 degrees of upward tilt and use a flexible front shell that allows more natural bending at the ankle. Walking boots with a rocker bottom are another option, particularly for people who need pain relief in the heel or sole alongside foot drop support.
Physical Therapy and Electrical Stimulation
Rehabilitation focuses on rebuilding strength in the muscles that lift the foot, maintaining flexibility, and retraining your walking pattern. A typical program includes stretching the Achilles tendon to preserve ankle flexibility, strengthening exercises for the small muscles of the foot, and progressive resistance training as strength returns. Weight-bearing exercises help restore overall leg and ankle stability.
Functional electrical stimulation (FES) is a particularly valuable tool. Small electrodes deliver pulses to the muscles in the front and outer compartments of the lower leg, causing them to contract and lift the foot. Unlike a brace, which passively holds the foot in position, FES actively works the muscles. This helps prevent the wasting that comes from disuse, encourages the brain and nerves to relearn motor patterns, and directly improves ankle lift, balance, and walking mechanics. Sessions typically start with low repetitions and gradually increase over several weeks.
When Surgery Is Needed
If the underlying nerve damage can be identified and addressed, nerve-focused procedures are the first surgical option. Nerve decompression (relieving pressure on the nerve), nerve repair, or nerve grafting can all be effective. In a study of peroneal nerve surgeries, neurolysis (freeing the nerve from surrounding scar tissue) produced useful motor recovery in roughly 80% of patients. Nerve repair led to meaningful functional improvement in about 58% of cases.
For foot drop that persists beyond a year with little sign of improvement, tendon transfer surgery becomes the primary option. The most common approach takes the tendon from a muscle that pulls the foot inward and reroutes it through the membrane between the shin bones to the top of the foot, effectively giving it a new job: pulling the foot upward. More complex versions, like the Bridle procedure, connect multiple tendons together to create balanced motion in several directions. When a patient also has weakness turning the foot outward, the transferred tendon is anchored more toward the outer side of the foot to compensate.
After tendon transfer surgery, patients typically wear a cast during initial healing, followed by at least six months of dedicated rehabilitation.
Recovery Outlook
Prognosis depends heavily on the cause. About one-third of people with closed peroneal nerve injuries recover on their own without surgery. For the remaining two-thirds who need intervention, outcomes vary by the type and timing of the procedure. Tendon transfers have strong results: in published series, all patients who underwent tendon transfer achieved at least moderate recovery, with two-thirds reaching a level considered functionally useful for daily life.
Nerve injuries caused by temporary compression, like from a cast or prolonged positioning during surgery, tend to have the best outlook. Foot drop caused by progressive neurological conditions like ALS or certain muscular dystrophies is less likely to resolve, and management focuses on maintaining mobility and preventing falls. In cases linked to a herniated disc or spinal stenosis, treating the spinal problem often improves or resolves the foot drop, especially when caught early.