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Splayfoot – Causes, Symptoms & Treatment

Splayfoot is a common foot deformity in which the transverse arch of the foot flattens, causing pain and pressure points in the forefoot area.

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Things worth knowing about "Splayfoot"

Splayfoot is a common foot deformity in which the transverse arch of the foot flattens, causing pain and pressure points in the forefoot area.

What is Splayfoot?

Splayfoot (medical term: Pes transversoplanus) is one of the most common foot deformities in the general population. It occurs when the transverse arch of the foot – the curved structure running across the forefoot – flattens or collapses entirely. As a result, the metatarsal bones spread out in a fan-like shape, which is the origin of the condition's name.

Causes

Splayfoot usually develops due to a combination of several contributing factors:

Weak connective tissue and musculature: Insufficient strength in the foot and toe muscles leads to a collapse of the transverse arch.
Excess body weight: Increased body weight places persistent stress on the foot arch, promoting its flattening.
Inappropriate footwear: Narrow, short, or high-heeled shoes significantly contribute to the development of splayfoot.
Prolonged standing and walking: Occupations requiring long periods of standing on hard surfaces increase the risk.
Genetic predisposition: A family history of weak connective tissue can predispose individuals to splayfoot.
Age: As people age, connective tissue loses elasticity, weakening the transverse arch.
Pregnancy: Hormonal changes and increased body weight during pregnancy place additional strain on the foot arch.

Symptoms

The symptoms of splayfoot vary widely, ranging from mild discomfort to significant pain:

Pain in the forefoot area, especially when walking or standing
Pressure points and calluses under the ball of the foot due to uneven pressure distribution
Burning sensation or numbness in the toes caused by nerve irritation
Morton's neuroma: Compression of a nerve between the metatarsal bones, causing sharp stabbing pain
Hammer toes or claw toes: Secondary toe deformities resulting from splayfoot
Hallux valgus: Lateral deviation of the big toe, which frequently accompanies splayfoot

Diagnosis

Splayfoot is typically diagnosed by an orthopaedic specialist or foot care professional using the following methods:

Clinical examination: Assessment of foot shape, gait pattern, and pressure points through physical inspection and palpation
Pedobarography (foot pressure analysis): Digital measurement of pressure distribution under the foot during standing and walking
X-ray imaging: Weight-bearing X-rays show the degree of transverse arch collapse and any associated deformities

Treatment

Treatment of splayfoot depends on the severity of the deformity and the extent of symptoms. In most cases, conservative (non-surgical) therapy is sufficient.

Conservative Measures

Orthotic insoles: Custom or prefabricated insoles with transverse arch support help redistribute pressure and relieve pain
Physiotherapy: Targeted exercises strengthen the foot and calf muscles, helping to stabilise the transverse arch
Footwear advice: Wide, flat shoes with sufficient toe room reduce pressure on the forefoot
Weight management: Reducing excess body weight relieves strain on the foot arch
Heat therapy and massage: Can ease muscle tension and improve circulation in the foot

Surgical Treatment

In severe cases where conservative measures do not provide adequate relief, surgical intervention may be necessary. Procedures involve correcting the alignment of the metatarsal bones or toe deformities. Surgery is considered a last resort and is only recommended when symptoms cause significant functional impairment.

Prevention

The following measures can help prevent splayfoot or slow its progression:

Regular foot exercises and walking barefoot on natural surfaces
Wearing well-fitting, wide shoes with adequate toe space
Avoiding prolonged use of high-heeled footwear
Maintaining a healthy body weight through balanced nutrition
Alternating between sitting and standing during the working day

References

Wülker, N. (Ed.) – Taschenlehrbuch Orthopädie und Unfallchirurgie, Thieme Verlag, 3rd Edition, 2015.
Deutsche Gesellschaft für Orthopädie und Orthopädische Chirurgie (DGOOC) – Guidelines on Foot Deformities, www.awmf.org.
Richter, M. & Zech, S. – Fuß und Sprunggelenk: Diagnostik und Therapie, Elsevier Verlag, 2018.

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