Flat Foot (Pes Planus): Causes, Symptoms, Treatment & Prevention

Flat foot, also known as pes planus, occurs when the arch of the foot is either very low or completely absent, causing the entire sole to touch the ground when standing. Some people are born with flat feet, while others develop them due to injuries, medical conditions, or aging.

Flat feet can lead to pain, difficulty walking, and even joint problems in the knees, hips, and back. While some individuals may not experience discomfort, others struggle with mobility and stability. The good news is that flat feet can be managed with supportive shoes, orthotics, exercises, and, in some cases, surgery.

What Are Flat Feet?

Pes planus means:

• The arch on the inner side of your sole is flattened and appears to touch the ground.
• The flattened arch causes your heel to point outward and your ankle to roll inward.
• Your talus bone, a bone on the inner side of your foot, sticks out.

Providers may classify your flat feet as flexible or rigid (sometimes flat or always flat). Flat feet can also be congenital (due to conditions present at birth) or acquired (something that happens later in life).

What Are the Different Types of Flat Feet?

There are several types of flat feet, including Flexible Flat Foot, Rigid Flat Foot, Congenital Flat Foot, and Acquired Flat Foot (Fallen Arches), and understanding them can help determine the best way to manage the condition:

• Flexible Flat Foot: The most common type. You can see arches in your feet when you aren’t standing, but they disappear when you stand. This type is usually painless but can cause discomfort over time.
• Rigid Flat Foot: Arches are absent whether standing or sitting. This type is rare and may limit foot movement. It can lead to long-term mobility issues and chronic pain.
• Congenital Flat Foot: Some babies are born with structural issues preventing arch formation. This may require early intervention to prevent complications.
• Acquired Flat Foot (Fallen Arches): Also known as progressive collapsing foot deformity, this condition occurs in adulthood after natural arches develop but later collapse due to injury, medical conditions, or excessive strain.

What Are the Symptoms and Causes of Flat Feet?

Common Symptoms of Flat Feet

Flat feet don’t always cause symptoms, but when they do, they may include Foot Pain, Ankle Instability, Knee, Hip & Back Pain, Walking Difficulties (Gait Changes), Increased Risk of Injuries, Difficulty in Sports and Physical Activities, and Limited Shoe Options:

• Foot Pain: Aching or discomfort in the arch, heel, or along the inside of the foot due to the lack of shock absorption.
• Ankle Instability: A tendency for the ankle to roll inward, leading to discomfort and frequent sprains.
• Knee, Hip & Back Pain: Improper foot alignment affects posture, and places stress on other joints.
• Walking Difficulties (Gait Changes): An altered walking pattern leading to discomfort and fatigue.
• Increased Risk of Injuries: Higher chances of developing shin splints, Achilles tendonitis, and plantar fasciitis.
• Difficulty in Sports and Physical Activities: Balance and agility are compromised due to a lack of arch support.
• Limited Shoe Options: Most footwear is designed for individuals with normal arches, making it difficult to find comfortable shoes.

What Causes Flat Feet?

Flat feet can develop due to various reasons, including Genetics, Injuries, Medical Conditions, Age, and Obesity:

• Genetics: Some individuals inherit flat feet from family members, making it a lifelong condition.
• Injuries: Foot fractures, ligament damage, or tendon injuries can lead to arch collapse.
• Medical Conditions: Arthritis, diabetes, and nerve issues can weaken the foot’s arch.
• Age: Over time, the foot’s muscles and connective tissues weaken, leading to fallen arches.
• Obesity: Excess weight increases strain on the feet, contributing to arch collapse.

How Are Flat Feet Diagnosed?

A healthcare provider can diagnose flat feet through various tests and observations:

• Physical Examination: Observing how the foot looks while standing and walking.
• Wet Footprint Test: Identifying whether an arch is present or completely flattened.
• Imaging Tests: X-rays, CT scans, or MRIs to assess bone structure and rule out other foot conditions.

What Are the Best Ways to Manage and Treat Flat Feet?

Non-Surgical Treatments for Flat Feet

Managing flat feet without surgery is possible through various methods:

• Supportive Shoes: Proper footwear with good arch support helps reduce discomfort.
• Orthotic Insoles: Custom or over-the-counter inserts provide extra arch support.
• Stretching and Strengthening Exercises: Strengthening foot muscles improves flexibility and reduces strain.
• Physical Therapy: Helps correct posture and walking patterns to alleviate pain.

When Is Surgery Needed for Flat Feet?

Surgery is rarely needed but may be considered if pain is severe and other treatments fail. Some common procedures include:

• Tendon Repair or Transfer: Strengthening weakened or damaged tendons.
• Bone Realignment (Osteotomy): Adjusting bone positioning to create an arch.
• Fusion Surgery: Stabilizing joints by fusing bones together.

Can Flat Feet Be Prevented?

Flat feet can’t always be prevented, but certain habits can help manage symptoms or delay progression:

• Maintain a healthy weight to reduce strain on the feet.
• Wear supportive shoes to prevent discomfort and promote arch reinforcement.
• Engage in foot-strengthening exercises to maintain muscle support.
• Avoid prolonged standing to prevent foot fatigue and weakening.

What Is the Long-Term Outlook for People With Flat Feet?

Most individuals with flat feet can lead normal, active lives with proper management. While some may experience discomfort, symptoms can often be controlled with supportive footwear, orthotics, and therapy. However, if pain persists, consulting a healthcare provider is recommended to explore advanced care options for long-term relief.

Final Thoughts

Pes planus, or flat foot, isn’t always a major issue, but for some, it can lead to pain, instability, and long-term joint problems. Understanding the causes, symptoms, and treatments can help individuals manage discomfort and maintain mobility. Simple changes like wearing supportive shoes, doing strengthening exercises, and seeking professional help from Advance Care when needed can make a big difference in foot health. If flat feet are causing persistent pain, consulting a specialist is the best step toward finding relief and improving daily comfort.