Flat Foot and Plantar Fasciitis: Understanding Two Common Causes of Foot Pain

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How Flat Feet Can Influence Walking and Everyday Mobility

The feet provide the foundation for many everyday movements. They support body weight, help maintain balance and distribute forces when a person walks, runs or stands. One of the important structural features of the foot is its arch, particularly along the inner border. When this arch becomes very low or is absent during standing, the condition is commonly known as flat foot.

Flat feet are not necessarily associated with pain or disability. Some individuals have naturally low arches and remain comfortable throughout their lives. However, other people experience discomfort, mechanical imbalance and changes in lower-limb alignment. Understanding how flat foot affects movement can help individuals recognise when an assessment may be necessary and learn about available management approaches.

What Is the Normal Function of the Foot Arch?

The arch helps distribute body weight across the foot and supports movement during everyday activities. It works together with bones, muscles, ligaments and tendons to provide stability and flexibility. When a person stands, the arch helps manage the forces transferred from the lower leg to the ground.

In flat foot, the normal arch becomes very low or disappears during weight-bearing. The entire sole, including the inner border, may come into contact with the ground. The extent of flattening and its effect on movement can vary considerably between individuals.

Flexible and Rigid Flat Foot

In flexible flat foot, an arch may become visible when the person sits or removes weight from the affected foot. In more rigid forms, the arch remains low even without weight-bearing. This distinction can be important because it helps guide the clinical assessment and treatment discussion.

Why Do Some Adults Develop Flat Feet?

Flat foot can be associated with inherited foot structure, injuries, weak supporting arches, arthritis and tendon problems. In some individuals, the condition is present from an early age. In others, the arch may gradually change over time.

Inherited Structural Characteristics

Genetic factors can influence the shape and alignment of the feet. Individuals with a family history of flat foot may have similar structural characteristics. However, the presence of low arches does not automatically mean that medical treatment is required.

Posterior Tibial Tendon Injury

The posterior tibial tendon contributes to supporting the inner side of the foot. When this tendon becomes injured or does not function effectively, the arch may gradually lose support. Patients may experience discomfort along the inner foot and changes in ankle alignment.

Arthritis and Previous Injuries

Arthritis and previous injuries can affect the joints and supporting structures of the foot. These changes may contribute to reduced arch height or altered movement. The underlying cause should be investigated when symptoms develop or foot alignment changes progressively.

Increased Mechanical Loading

Obesity and prolonged weight-bearing activities can increase the mechanical demands placed on the feet. In some individuals, these factors may contribute to symptoms or make an existing structural condition more noticeable.

How Flat Foot Can Change Walking Mechanics

The structure of the foot influences how forces travel through the lower limbs. When the arch becomes very low, the alignment of the heel and ankle may change. Some individuals experience the ankle moving inward while standing or walking.

Changes in foot mechanics may also influence the stresses experienced by surrounding joints. The knees, hips and other structures may be affected by altered movement patterns in some patients. However, the relationship between flat foot and joint symptoms varies, and not every person develops complications.

Effects on Balance and Physical Activity

Some individuals with symptomatic flat foot report fatigue or discomfort during prolonged walking. Certain sporting activities may also become difficult when pain or mechanical instability is present. A clinical examination can help establish whether the foot structure is contributing to these limitations.

Symptoms That May Indicate a Problem

Symptoms depend on the underlying cause and severity. People with asymptomatic flat feet may not require treatment, while those experiencing structural changes may need further evaluation.

• Persistent discomfort along the inner side of the foot.


• Pain around the ankle during walking.


• Very low or absent arches while standing.


• Visible inward movement of the ankle or heel.


• Foot fatigue following prolonged activity.


• Mechanical imbalance while walking.


• Difficulty participating in certain physical activities.


• Increasing discomfort or changes in foot alignment.

Associated conditions may include Achilles tendonitis and arthritis. Persistent pain, swelling or progressive deformity should be assessed rather than managed through footwear changes alone.

How Doctors Assess Flat Foot

A clinical evaluation generally begins with a review of symptoms and medical history. The doctor may ask whether the foot structure has always been similar or whether the arch has changed over time. Previous injuries, pain patterns and activity levels may also be discussed.

Physical Assessment

The doctor may observe the foot while standing and walking, assess the arch and examine heel alignment. Flexibility, ankle movement and tendon function may also be evaluated. These findings help determine whether the condition is flexible or rigid and whether additional investigations are required.

Role of X-rays, CT and MRI

X-rays can help assess bone alignment and structural changes. CT scans may provide detailed information about bone anatomy, while MRI can help evaluate tendons and other soft tissues. These investigations are selected according to the suspected cause and clinical findings.

Non-Surgical Treatment for Flat Feet

Many patients can initially manage flat foot through conservative measures. Treatment generally focuses on reducing discomfort, improving support and addressing contributing mechanical factors.

Custom Insoles and Orthotic Supports

Insoles with custom supports may help distribute pressure more comfortably and provide additional support to the foot. A medial wedge or post may also be considered in selected patients. The type of support should be based on the individual's foot structure and symptoms.

Extra-Wide Fitting Shoes

Some patients experience discomfort because ordinary footwear does not accommodate their foot shape. Extra-wide fitting shoes may provide additional space and improve comfort. Footwear should also be compatible with any prescribed orthotic support.

Exercises and Physiotherapy

Exercise programmes may include movements designed to improve foot strength and flexibility. Heel cord stretching can be useful in selected patients, depending on examination findings. A physiotherapist can guide appropriate exercises and demonstrate techniques such as golf ball rolling beneath the foot when included in the recommended programme.

When Is Surgery Necessary?

Severe flat foot associated with persistent pain or significant functional limitations may require surgical consideration, particularly when conservative treatment has not provided sufficient improvement. Surgery is not recommended simply because an individual has low arches.

Medial Calcaneal Osteotomy

A medial calcaneal osteotomy is a procedure that involves changing the position of the heel bone to improve alignment. It may form part of a surgical plan for selected patients with significant flat foot deformity.

Tendon Transfers and Other Osteotomies

Tendon transfers may be considered when supporting tendon function needs to be addressed. Other osteotomies may also be used to correct specific structural abnormalities. The selection of procedures depends on the severity of deformity, joint condition and individual anatomy.

Patients should discuss the intended correction, potential risks, recovery requirements and rehabilitation process before deciding on surgery.

Long-Term Foot Care and Practical Considerations

Managing flat foot involves understanding the condition rather than focusing only on the appearance of the arch. Patients can discuss practical measures with their treating professional.

• Choose footwear that provides adequate space and comfort.


• Use prescribed orthotic supports consistently when recommended.


• Perform appropriate stretching and strengthening exercises.


• Modify activities that repeatedly increase discomfort.


• Seek medical evaluation if the arch becomes progressively flatter.


• Attend follow-up consultations when symptoms or alignment changes.

Flat foot

Consulting an Orthopaedic Professional in Ahmedabad

Individuals experiencing foot pain or changes in arch structure can consider an orthopaedic evaluation. Dr. Parth Parekh completed his MBBS from Smt. N.H.L. Medical College, Ahmedabad, in 2008. His subsequent education includes a Diploma in Orthopaedics and a Diplomate of National Board qualification in Orthopaedics. His postgraduate background also includes training involving sports medicine and arthroplasty.

His consultation location is Cabin No. 13, EPIC Hospital, Rajpath Rangoli Road, behind Rajpath Club, off Sarkhej-Gandhinagar Highway, Bodakdev, Ahmedabad, Gujarat 380054. Patients can bring previous X-rays, CT scans or MRI reports when available. Appointment availability should be confirmed before visiting.

Conclusion

Flat foot affects the normal arch structure of the foot and can influence weight distribution, ankle alignment and walking mechanics. Causes may include genetic characteristics, weak supporting structures, posterior tibial tendon injury, arthritis and previous injuries. Some individuals remain comfortable, while others experience pain and functional difficulties.

Conservative treatment may involve custom orthotic supports, extra-wide footwear, physiotherapy and heel cord Podiatrist stretching. Severe symptomatic deformities may require procedures such as medial calcaneal osteotomy, tendon transfers or other osteotomies. A proper clinical assessment helps determine whether click here treatment is necessary and which approach may be appropriate.

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