Foot deformities refer to any changes in the foot that deviate from the ideal, healthy foot. These conditions are caused by misalignments of the foot bones, which result from improper weight-bearing on the foot or ill-fitting footwear.
Based on when they occur, a distinction is made between primary (congenital) foot deformities, which are already apparent in newborns and children, and secondary (acquired) foot deformities, which are often caused by muscular imbalance or neurological disorders and can develop later in life, e.g., foot deformities associated with diabetes. Based on their cause (etiology), rheumatic changes are distinguished from neurogenic foot deformities and other neurological disorders.
Finally, in daily practice, physicians distinguish between foot deformities based on their appearance and the associated symptoms:
In addition, there are deformities of the toes, such as:
Some of these deformities can lead, over time, to a flattening of the arch of the foot or to a misalignment in the midfoot region.
Anatomy of the foot © bilderzwerg #54960419 | AdobeStock
The symptoms of foot deformities depend heavily on the underlying misalignment in the toes or foot. Typically, pain occurs during weight-bearing activities or while walking, often accompanied by improper weight distribution on the foot. Persistent or improper weight-bearing on the foot can also lead to inflammation and pain in the joints. A changed foot position or various compensatory movements—and the associated improper weight distribution—can damage the joints in the ankle, hock, or knee, which can also cause further pain. The muscles and tendons adapt to this, and ultimately, the affected person’s entire gait may change. The tarsus and metatarsus can also become overloaded due to chronic misalignment.
Toe deformities such as hammertoe or hallux valgus—which frequently occurs on the outside of the foot near the big toe—are particularly painful when walking and often cause blisters due to friction from shoes. Over time, hallux valgus also causes the big toe and adjacent toes of the affected foot to tilt more and more inward. This condition is particularly common among older women.
Depending on the type and severity of the foot or toe deformities, walking and running become increasingly difficult, and wearing shoes becomes more painful.
Many foot deformities become noticeable after some time due to their conspicuous appearance, allowing specialists to quickly identify them through a visual examination. An X-ray is also helpful for more accurately assessing the position of the foot bones and the arch of the foot.
For example, in a patient standing barefoot with a high arch, the outer side of the foot is raised by up to two centimeters, meaning it no longer makes contact with the ground. In the case of a fallen arch or flat foot, on the other hand, the entire former arch now lies flat against the ground. Splayfoot, in turn, is characterized by metatarsal bones that are widely spaced apart.
For newborns and children, or in cases of unclear symptoms, an imaging procedure is used; this is usually an X-ray. This makes it very easy to visualize bone deformities in the foot skeleton—which are not visible from the outside—as well as bony spurs, such as those associated with heel spurs or hallux valgus.
Imaging also has the major advantage of allowing for better planning of further treatment, such as surgery.
The treatment of foot and toe deformities depends, on the one hand, on the type and severity of the deformity and, on the other hand, on the specific symptoms. Doctors distinguish between conservative and surgical treatment approaches.
In the majority of cases, specialists will first attempt to achieve relief through conservative treatment. However, it is important to note that depending on the patient’s age and the duration of the condition, the available options may be limited.
Conservative treatment primarily involves using special insoles, pressure-relieving orthotics, wearing wide-fitting shoes, or even custom-made orthopedic shoes. Foot exercises are another way to achieve relief, especially in the early stages of the condition. Doctors also often recommend simply walking barefoot, especially in the summer, as this allows the feet to experience their natural environment while also sharpening the senses.
In some cases, conservative treatment is no longer sufficient—especially when the symptoms become too severe, walking is only possible to a limited extent, or further joint damage occurs. In such situations, doctors often decide to perform surgical treatment. In severe cases, the deformity can only be corrected through surgical realignment of the foot bones.
The goal is to correct the deformity or reduce painful bony protrusions (e.g., in cases of hallux valgus, heel spurs, or hammertoe).
The options available in modern foot surgery range from minor corrections of deformities to bone resections and osteotomies. The latter becomes necessary, for example, when a hallux valgus must be straightened. In such cases, specialists attempt to realign several misaligned toes back into the correct position relative to the foot skeleton.
Follow-up rehabilitation can also improve the chances of a successful recovery. It is important to gradually rebuild the calf muscles afterward to prevent the foot from being subjected to incorrect stress again.
Foot deformities fall within the scope of orthopedic specialists who focus on hand and foot surgery. These specialists also treat patients with muscular imbalances or neurological conditions that lead to foot deformities. They are typically found in specialized centers. You can identify these experts before a consultation primarily by their proven experience and their participation in regular continuing education in their respective fields.
1. What is a foot deformity?
A foot deformity describes a deviation of the foot’s shape from the healthy, normal form. It can be congenital or develop over the course of a person’s life due to improper weight-bearing on the foot, ill-fitting footwear, or muscular imbalances.
2. What symptoms occur with a foot deformity?
Typical signs include pain when walking, pressure points, an altered gait, or swelling. In cases of severe deformity, the load on the foot and joints may also change.
3. How are foot deformities diagnosed?
The diagnosis is usually made through a visual examination. An X-ray also helps assess the position of the foot bones and the arch of the foot and plan treatment.
4. What treatment options are available?
Mild deformities are often treated with orthotics, foot exercises, or orthopedic footwear. In severe cases, surgical correction of the foot bones may be necessary to relieve pain and restore mobility.
