✅ Medically reviewed by Dr. Thomas Biernacki, DPM — Board-Certified Podiatrist · Last updated April 6, 2026

Can You Fix Flat Feet? A Podiatrist Explains (2026)

Flat Feet (Pes Planus) — When to Worry and When to Relax

Flat feet are among the most over-diagnosed and over-treated conditions in podiatric practice. The vast majority of flat feet — particularly in children and young adults — are flexible, painless, and entirely functional. The presence of a low or absent arch alone is not a medical problem and does not require treatment. However, specific types of flat foot deformity, particularly adult-acquired flatfoot (progressive collapsing foot deformity), are serious conditions with significant consequences if inadequately managed. Distinguishing benign from pathological flat foot is the central clinical challenge.

Types of Flat Foot

Flexible flatfoot is the most common type — the arch is absent when standing but reappears when the patient stands on tiptoe or sits with the foot unloaded. The posterior tibial tendon and plantar ligaments are intact and functional; the foot simply exhibits greater laxity. Rigid flatfoot — absent on tiptoe as well as during standing — suggests a structural abnormality such as tarsal coalition (bony fusion between tarsal bones) and warrants imaging. Adult-acquired flatfoot (progressive collapsing foot deformity) represents a spectrum of posterior tibial tendon dysfunction and ligamentous failure that causes progressive, symptomatic arch collapse in previously normal feet — typically in middle-aged adults.

Adult-Acquired Flatfoot — The Serious Variant

Adult-acquired flatfoot begins with posterior tibial tendon dysfunction — progressive weakening and eventual rupture of the tendon that actively supports the medial arch. Classic presentation is medial ankle pain and swelling, progressive inward rolling of the heel (heel valgus), and inability to perform a single-leg heel raise on the affected side. Without treatment, the condition progresses through four stages from functional tendon weakness to fixed rigid deformity requiring joint fusion for correction. Early diagnosis in Stage I or II, when tendon function is still present, allows conservative management (bracing, orthotics, physical therapy) or limited reconstructive surgery to prevent progression to the more complex late stages.

Children With Flat Feet

Flat feet are developmentally normal in infants and toddlers — arch formation begins around age 2 to 3 and continues through adolescence. Most children with flat feet develop normal arches without intervention. Treatment is indicated only for painful flat feet that limit activity, progressive deformity, or flat feet associated with underlying neuromuscular conditions. Orthotics for asymptomatic pediatric flatfoot do not accelerate arch development or prevent future problems according to current evidence — they may provide symptom relief for painful feet but are not indicated for cosmetic or prophylactic purposes in painless flexible flatfoot.

Conservative Management for Symptomatic Flat Feet

Symptomatic flexible flatfoot responds well to conservative management in most patients. Supportive footwear with motion control features reduces excessive pronation. Custom orthotics with medial arch support and heel posting offload the posterior tibial tendon and plantar fascia. Physical therapy targeting posterior tibial tendon strengthening (heel raises, single-leg balance exercises) builds the active support that reduces strain on passive ligamentous structures. Weight management significantly reduces mechanical demands on an already-stressed arch. NSAIDs and ice manage acute inflammatory episodes. The majority of symptomatic flexible flatfoot patients achieve adequate pain control without surgery with consistent conservative management.

Surgical Options for Flat Foot

Flat foot reconstruction for advanced adult-acquired flatfoot typically combines multiple procedures addressing the tendon deficit, ligamentous instability, and bony malalignment simultaneously. Common elements include posterior tibial tendon reconstruction or transfer, medial calcaneal slide osteotomy (shifting the heel inward), lateral column lengthening (opening wedge osteotomy of the calcaneus), and in severe cases, subtalar or triple arthrodesis. These are major reconstructive surgeries with recovery times of 3 to 6 months and potential for significant complications. They are appropriate only when conservative care has genuinely failed and quality of life is significantly impaired.

Flat Feet in Adults: When Symptoms Develop and Why

Many adults have had flat feet their entire lives without significant symptoms — the foot accommodates to its architecture, muscles develop compensatory strength, and walking mechanics adjust. So why do some flat-footed adults develop pain in their 30s, 40s, or 50s after decades without problems? The answer typically involves one or more precipitating changes: weight gain that exceeds the compensatory capacity of the posterior tibial tendon and plantar fascia, a period of increased activity (starting a walking program, a new job requiring prolonged standing) that stresses structures previously not under high demand, deconditioning of the intrinsic and extrinsic foot muscles from prolonged sedentary lifestyle, or the early stages of posterior tibial tendon dysfunction (adult-acquired flatfoot) in which the primary arch-supporting tendon is actively degenerating.

Adults with previously asymptomatic flat feet who develop new pain deserve careful evaluation to distinguish simple mechanical overload (which responds well to orthotics and activity modification) from early PTTD (which requires more aggressive intervention to prevent progressive deformity and eventual arthritis). The clinical markers of PTTD — asymmetric deformity worsening over months, inability to perform a single-leg heel rise, progressive medial ankle pain — should prompt urgent podiatric evaluation. Treating progressive PTTD conservatively in Stage 2 (flexible deformity, intact tendon function) avoids the need for the complex reconstructive surgery required for Stage 3 and 4 disease. At Balance Foot & Ankle in Howell and Bloomfield Hills, we evaluate adult flatfoot with attention to distinguishing mechanical from progressive pathology and direct treatment accordingly.

Michigan patients can access expert custom orthotics in Michigan at Balance Foot & Ankle. Our board-certified podiatrists serve Howell (4330 E Grand River) and Bloomfield Hills (43494 Woodward Ave #208). Schedule an appointment online or call (810) 206-1402 for same-week availability.

Related Patient Guides

• Flat Feet: Causes, Symptoms & Treatment
• Posterior Tibial Tendon Dysfunction (PTTD)
• 3D Custom Orthotics at Balance Foot & Ankle

Medical References & Sources

• American Podiatric Medical Association — Flat Feet & Orthotics
• PubMed Research — Flat Foot Treatment

Clinical References

1. Deland JT. “Adult-acquired flatfoot deformity.” Journal of the American Academy of Orthopaedic Surgeons. 2008;16(7):399-407.
2. Lee MS, et al. “Diagnosis and treatment of adult flatfoot.” Journal of Foot and Ankle Surgery. 2005;44(2):78-113.
3. Banwell HA, et al. “Foot orthoses for adults with flexible pes planus: a systematic review.” Journal of Foot and Ankle Research. 2014;7(1):23.

Dr. Tom Biernacki, DPM

Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.