What is a claw toe?
A claw toe is a toe deformity that primarily affects the smaller toes. It is not as common as a bunion (hallux valgus) or a hammer toe.
Claw toes are associated with swan-neck deformity, which is a curvature of the toe or finger joints caused by tendon damage.
The smaller toes have three joints:
- the metatarsophalangeal joint,
- the middle toe joint (PIP joint), and
- the distal interphalangeal (DIP) joint.
A claw toe is defined as
- a pathological hyperextension of the metatarsophalangeal joint and
- increased flexion at the middle and distal interphalangeal joints.
This position makes the toe appear curved like a claw.
The anatomy of the foot © bilderzwerg / Fotolia
Causes of a claw toe
A claw toe is almost never congenital. It develops during adulthood in connection with overarching foot deformities such as
- flat feet,
- spread foot or flat-arched foot, and
- hallux valgus.
Claw toes can also develop as a result of paralysis and certain neurological disorders. In addition, orthopedically unsuitable footwear (high heels) is believed to contribute to the condition.
What are the potential consequences of a claw toe?
Depending on its severity, a claw toe can become increasingly problematic from an aesthetic standpoint. Clinical symptoms often arise from pressure points: The curved toe no longer fits properly into the shoe, and calluses and pressure points (corns) form in particularly exposed areas. This can lead to severe pain and, in some cases, inflammatory complications.
Treatment of a Claw Toe
A claw toe can often be corrected through conservative treatment of the underlying foot deformity. A prerequisite for this is that the claw toe deformity has not yet become contracted, i.e., stiffened.
Conservative orthopedic procedures include, for example, the use of
- shoe inserts,
- strap bandages,
- night splints, and
- silicone interdigital orthoses.
Toe exercises can be helpful. Footwear must be chosen to be sufficiently roomy and soft.
Unfortunately, the results of such conservative treatments remain unsatisfactory in many cases. Contracted deformities cannot be treated with conservative methods anyway. Attempts to treat corns or calluses with ointments or by cutting them out locally, without addressing the underlying cause of the deformity, are completely futile.
As a result, a pronounced claw toe deformity is often treated surgically. Contraindications for surgery include incomplete bone growth and severe arterial circulatory disorders.
Surgery for a claw toe
The best-known surgical method is the so-called Hohmann procedure. The principle of this procedure is the permanent correction of the deformity through
- partial removal of the severely misaligned joint and
- creating a connective-tissue fusion.
Technically, the procedure involves removing approximately one-third of the proximal phalanx on the side of the joint closest to the middle joint of the toe. This can often be performed under regional anesthesia rather than general anesthesia.
Depending on the intraoperative findings, the often-shortened extensor tendon may also be lengthened. Occasionally, capsular release at the proximal joint is also necessary. The actual correction of the deformity is then straightforward to perform.
The result is secured by a stabilizing wire inserted along the entire length of the toe into the metatarsal bone. After two to three weeks, sufficient scar tissue stabilization has occurred, and the wire can be removed. During this time, the patient wears a so-called forefoot-relief shoe, which is a special cast shoe.
Afterward, the patient can quickly return to wearing normal footwear.
Alternatively or as a supplementary measure, the affected joints can be fused (known as MTP or PIP arthrodesis). This is particularly useful in cases of severe contractures.
Prognosis for a claw toe
The prognosis is good if the medical team treats not only the claw toe itself but also its underlying cause. In most cases, a misalignment of the entire forefoot is the cause or occurs alongside the claw toe.
Patients usually find permanent relief from their symptoms and are no longer impaired in their daily lives. In the vast majority of cases, they can also resume their usual recreational sports without any problems.
FAQ: The 8 Most Important Questions About Claw Toes and Hammer Toes
What is the difference between a hammer toe and a claw toe?
The difference lies in the type of joint deformity. In a hammer toe, the distal joint is bent, so that the toe looks like a hammer, while the proximal joint is often in its normal position. In a claw toe, on the other hand, the metatarsophalangeal joint is hyperextended and the middle and distal joints are bent, resembling an animal’s claw. In practice, these deformities often occur in combination, which is why doctors frequently refer to them collectively as hammer and claw toes or hammer toe and claw toe.
What are the most common causes of claw toes?
The most common cause is improper footwear. Wearing shoes that are too tight or high-heeled shoes squeezes the toes together and forces them into an abnormal position. Other causes include foot deformities such as splayfoot, in which the transverse arch collapses, as well as neurological conditions that lead to paralysis of the small foot muscles. Genetic predisposition and conditions such as arthritis can also contribute to the development of claw toes and hammer toes.
How can a claw toe be treated?
Treatment for claw toes depends on the stage of the condition. In the early stages, when the toes are still mobile, conservative measures can help. These include wearing orthotics that support the arch, splints, and targeted toe exercises to strengthen the muscles. It is also important to switch to comfortable shoes that provide sufficient space for the toes. If conservative methods fail, the claw toe must be treated through surgical correction.
When is surgery for a claw toe necessary?
Surgery is recommended if the deformity has become stiff (contracted) and is causing severe pain or corns that do not respond to treatment. The goal of the surgery is to straighten the toe and relieve pressure on the joint. A common procedure is the Hohmann procedure, in which part of the bone in the proximal phalanx is removed to relieve tension on the tendons and permanently correct the hammertoe or claw toe.
What symptoms do hammertoes and claw toes cause?
The main symptom is painful pressure points and corns on the toe joints, as these constantly rub against the shoe due to the bending of the toes. The second through fourth toes are often affected. Calluses or inflamed thickened skin may form. In severe cases, dislocation of the metatarsophalangeal joint may occur, which significantly impairs walking. Claw toes are deformities that can also alter gait.
How can you prevent claw toes from developing?
Wearing ill-fitting shoes for years is often enough to cause claw toes. Therefore, the best prevention is to avoid high heels and shoes with toe boxes that are too narrow. Walking barefoot and doing regular exercises to strengthen the foot muscles help prevent muscular imbalances. Insoles can help prevent claw toes associated with deformities in the early stages of misalignments, such as splayfoot.
Which doctor treats claw toes?
If you have problems with your toes, an orthopedic specialist or a foot surgeon is the right person to consult. The orthopedic surgeon can determine whether the condition is a hammertoe or a claw toe and whether conservative treatment is sufficient or whether surgery for the claw toe is advisable. They will also explain the various causes and the prognosis.
Are claw toes hereditary?
While claw toes themselves are not directly inherited, a predisposition to foot deformities such as hallux valgus or splayfoot can run in families. These misalignments are often the cause of claw toe formation. Therefore, anyone with a family history of these conditions should pay special attention to wearing proper footwear and performing foot exercises early on to prevent claw toes from developing in the first place.
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