Foot drop refers to a condition when a person has difficulty lifting the front part of their foot to the proper angle when walking. This can lead to dragging of the foot or an altered gait, increasing the risk of tripping and falls. A wide range of diseases can cause foot drop, including multiple sclerosis (MS).

Although foot drop isn’t a disease itself, it’s caused by an underlying problem. This problem can be related to the structure of the body, the muscles, or the nerves. Identifying and treating the underlying cause is crucial for managing foot drop and improving mobility.

The condition results from weakness of the ankle extensor (the muscles responsible for movement), like in MS, or dysfunction of the peroneal nerve (which stimulates the muscles). If an individual has foot drop, their foot may appear to hang down or drag. They may also scuff their foot on the ground when they are walking, which can result in discomfort or accidents.

Fortunately, treatments are available for foot drop, including physical therapy, self-management strategies, assistive devices, and surgery.

Foot Drop in Multiple Sclerosis

Even though no studies have confirmed how common it is, foot drop is a frequently seen symptom in MS.

What Does Foot Drop Look Like?

Foot drop can affect one foot (unilateral) only or both feet (bilateral).

As a result of this muscle weakness or nerve injury, people with foot drop may drag their affected foot (or feet) on the ground while walking. Others may try to avoid dragging by bending their knees to raise the foot higher than usual, resulting in a steppage gait — when someone lifts their knee higher than normal to prevent their toes from dragging on the ground.

Impacts of Foot Drop

Walking up stairs, curbs, and on other uneven surfaces can be quite difficult for people with foot drop. To avoid obstacles that might make walking difficult, they may change their walking style, usually by lifting the affected leg higher as if climbing up.

Changing your way of walking is tiring, as it requires more effort and energy. This may cause you to feel wobbly. Over time, walking this way can lead to hip and lower back pain, muscle tightness, and issues with overall balance.

These difficulties in walking can also make you more prone to falling. This can sometimes be embarrassing or frustrating — especially if people don’t understand that it’s caused by MS — but also potentially dangerous with a risk of injury.

Foot drop can also affect your ability to do your job. Difficulty moving around can impact your productivity and ability to perform physical tasks.

What Causes Foot Drop in Multiple Sclerosis?

Foot drop results from weakness in the ankle muscles or lack of signaling between the brain and the leg muscles. In both cases, it becomes impossible to lift your foot to the correct angle when taking a step. This causes the toes to drag or scuff on the ground.

Foot drop becomes worse depending on what other MS symptoms you experience. Numbness and other abnormal foot sensations reduce sensitivity to the floor, which can cause changes in one’s walking ability and speed. Controlling your affected foot if you are experiencing MS spasms and muscle weakness can also be challenging.

Certain occupations that involve kneeling or squatting for a long time can also increase the risk of foot drop.

How Is Foot Drop Diagnosed?

If you’re experiencing difficulties raising the front of your foot while walking, you may have foot drop. Contact your neurologist so you can determine why this might be happening.

To diagnose foot drop, a doctor will perform a physical exam. They will observe the way you walk and check how your leg muscles work. In some cases, imaging tests may also be ordered to diagnose foot drop. These can include X-rays, CT/MRI scans, or ultrasound scans.

Even if you have MS, your foot drop may still be due to or worsened by nerve damage caused by other factors. In that case, your doctor may have you take nerve conduction tests to locate the point of damage. Your doctor may also perform electromyography, a diagnostic procedure in which electrodes are inserted into the muscle fibers to record their electrical activity.

Is MS-Related Foot Drop Permanent?

Foot drop in MS can be permanent or can get better with time. There are several treatment options for foot drop. Your doctor can help you come up with the best approach for your needs.

How Is Foot Drop Treated?

Foot drop treatment in MS involves physical therapy, assistive devices, and self-management strategies. In some cases, surgery may be necessary.

There are several treatments commonly used to manage foot drop.

Physical Therapy

Physical therapy can help you strengthen your leg, ankle, and foot muscles. Physical therapy can also help manage other MS symptoms that tend to worsen foot drop, including spasticity and walking-related complications.

Your physical therapist can also provide or recommend devices that can help correct your foot’s position.

Assistive Devices

There are two common types of devices used to treat foot drop: functional electrical stimulation (FES) and ankle-foot orthosis (AFO).

An FES device is typically placed on the leg or around the waist. These devices deliver electrical impulses to the nerves around the affected muscles, promoting leg movement as you walk. It is necessary to evaluate this treatment option with a trained physiotherapist. They will help you determine if it’s recommended for you.

AFO devices, which include braces and splints, are worn on the lower leg. These devices, typically made of plastic or carbon fiber, are used to place your foot and ankle in the correct position as you walk. If your doctor determines an AFO device is right for you, they may refer you to an orthotist (a person specifically trained in fitting braces and orthotics).

Self-Management

There are various lifestyle adjustments that you can make to manage your drop foot and help other treatments work more effectively. These include:

• Wearing the right footwear — Wear shoes that fit well, provide ankle support, and are lightweight so as not to tire out your muscles.
• Avoiding certain positions — Avoid positioning your body in ways that increase the risk of foot drop. Crossing your legs regularly can gradually lead to compression of the peroneal nerve on the upper part of the leg, and squatting or kneeling for too long can also cause foot drop.
• Taking it slowly — Practice caution when moving about. Know how to deal with obstacles in your surroundings, and avoid them if you can.
• Keeping your walkways clear — Remove potential hazards in your home, especially in high-traffic areas. That includes wires or cables that can cause trips and falls.

Surgery

Severe or long-lasting foot drop can lead to muscle paralysis, which can result in permanent difficulty with movement. Surgery can help.

Often, surgery for foot drop involves transferring muscle tendons from stronger leg muscles to the affected muscle. Another available procedure fuses the foot or ankle bones to steady the ankle. Talk with your doctor to find out if you’re a candidate for either one.

Find Your Team

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