Hallux Valgus: Exercises, Symptoms and Treatment Options

To learn more, consult the guide on Hallux Valgus. To learn more, consult the guide on Hallux Rigidus: Causes, Symptoms, and Treatment. To learn more, consult the guide on Exercises for Plantar Fasciitis: Complete Protocol.

Hallux valgus, also known as “bunion,” is one of the most common foot deformities, characterized by a lateral deviation of the big toe and a medial prominence of the first metatarsal head. This condition is not just an aesthetic problem, but can cause significant pain, difficulty walking, and functional limitations that seriously impact quality of life. Understanding the causes, symptoms, conservative treatment options, including specific hallux valgus exercises, the use of orthoses, and indications for surgical intervention, is fundamental for effective management.

With over thirty years of clinical experience in the field of physiotherapy, this article aims to offer a comprehensive and in-depth overview of hallux valgus, based on scientific evidence and consolidated clinical practice, to help patients navigate the various therapeutic options.

What is Hallux Valgus?

Anatomically, hallux valgus is a progressive deformity involving the metatarsophalangeal joint of the big toe. It occurs when the big toe deviates laterally (towards the other toes), while the head of the first metatarsal shifts medially (towards the inside of the foot). This deviation creates an abnormal angle between the first metatarsal and the proximal phalanx of the big toe, known as the valgus angle. The bony and soft tissue prominence that forms on the inside of the foot is often accompanied by an inflamed bursitis, which contributes to pain and redness.

For a complete overview, see the comprehensive guide to foot and ankle pain.

The pathology is not simply a bony growth, but a complex biomechanical alteration involving bones, ligaments, tendons, and muscles of the foot. The progressive dislocation of the joint leads to instability and malfunction of the foot as a whole, affecting load distribution and the mechanics of gait.

Causes and Risk Factors

The etiology of hallux valgus is multifactorial, meaning that several factors can contribute to its development and progression.

Genetic Factors and Family Predisposition

There is a strong hereditary component in hallux valgus. If a parent or close relative has had this condition, the likelihood of developing it increases. This does not mean that the deformity is directly inherited, but rather that structural characteristics of the foot (such as bone shape, ligamentous laxity, or a particular foot type) are inherited that predispose to the development of hallux valgus.

Inadequate Footwear

Shoes are one of the most significant environmental factors. Footwear with narrow toes, high heels, or a combination of both, forces the big toe into an unnatural position, pushing it towards the other toes and increasing pressure on the head of the first metatarsal. Prolonged use of such shoes can accelerate the development and progression of the deformity, especially in genetically predisposed individuals.

Foot Biomechanics

Biomechanical abnormalities of the foot can contribute to the development of hallux valgus:

• Flat Foot (Pronated Foot): A foot with a lowered or collapsed plantar arch tends to overpronate during gait. This pronation alters the mechanics of the first ray (first metatarsal and big toe), favoring the deviation of the big toe.
• Generalized Ligamentous Laxity: Increased elasticity of ligaments can make joints more unstable and susceptible to deformities under stress.
• Structural Abnormalities: Some people are born with an abnormal shape of the first metatarsal head or with a longer-than-normal first metatarsal, which can increase pressure and deviation.

Rheumatic Diseases

Conditions such as rheumatoid arthritis can cause chronic inflammation and joint damage, leading to multiple foot deformities, including hallux valgus. Inflammation weakens soft tissues and alters bone structure.

Trauma

Direct trauma to the foot or big toe, such as fractures or dislocations, can alter the anatomy and biomechanics of the joint, predisposing to hallux valgus.

Age and Sex

Hallux valgus is more common in women than in men, with an estimated ratio of 9:1. This is attributed to greater ligamentous laxity in women and more frequent use of inadequate footwear (high heels and narrow toes). Prevalence also increases with age.

Symptoms and Clinical Manifestations

The symptoms of hallux valgus can vary in intensity and nature depending on the stage of the deformity and the presence of complications.

• Pain: This is the most common symptom and often the main reason patients seek help. Pain can be localized on the bony prominence (the “bunion”), radiate to the sole of the foot (metatarsalgia), or to the other toes. It is often exacerbated by shoe pressure, prolonged walking, or physical activity.
• Visible Deformity: The lateral deviation of the big toe and the medial prominence of the first metatarsal head are evident. In more severe cases, the big toe may overlap or underlap the second toe.
• Difficulty Wearing Shoes: The bony prominence makes it difficult to find comfortable shoes, leading to rubbing and irritation.
• Calluses and Corns: Abnormal pressure and rubbing can cause the formation of calluses and corns on the medial prominence, under the heads of the lesser metatarsals (metatarsalgia), or between the toes.
• Bursitis: Inflammation of the bursa located over the bony prominence can cause redness, swelling, warmth, and acute pain.
• Metatarsalgia: Abnormal load transfer to the lesser metatarsals due to first ray dysfunction can lead to pain under the sole of the foot, especially under the heads of the second and third metatarsals.
• Functional Limitation: The combination of pain and deformity can limit big toe mobility, affect balance, and alter gait mechanics, making daily activities such as walking, running, or standing for long periods difficult.
• Lesser Toe Deformities: As hallux valgus progresses, the other toes may develop secondary deformities, such as hammer toes or claw toes, due to pressure and reduced space.

Diagnosis of Hallux Valgus

The diagnosis of hallux valgus is primarily clinical, but requires careful evaluation to determine the severity and most appropriate treatment options.

• Anamnesis (Medical History): The doctor or physical therapist will gather information on symptoms (pain, duration, triggering factors), family history, footwear use, and any pre-existing conditions.
• Physical Examination: The foot will be examined under load and without load. Visible deformity, the presence of bursitis, calluses, the mobility of the big toe and other toes, the presence of pain on palpation, and joint stability will be assessed. General posture and gait will also be observed.
• Instrumental Examinations:

• X-ray: This is the most important examination. Weight-bearing (standing) foot X-rays are performed in various projections (anteroposterior, lateral, oblique) to measure specific angles (hallux valgus angle, intermetatarsal angle, etc.), assess the presence of osteoarthritis, joint shape, and bone density. These measurements are crucial for classifying the severity of the deformity and planning any surgical intervention.

• Ultrasound: Can be useful for evaluating soft tissues, such as an inflamed bursa (bursitis), tendons, and ligaments, or to rule out other causes of pain.

• Magnetic Resonance Imaging (MRI): Rarely necessary for the diagnosis of hallux valgus, it may be indicated in cases of suspected more complex soft tissue injuries, advanced osteoarthritis, or other concomitant pathologies.

• Baropodometric Analysis: This examination evaluates the load distribution on the foot both statically and dynamically (during walking). It can reveal alterations in plantar pressure and gait mechanics that contribute to the pathology or are a consequence of it.

The combination of anamnesis, physical examination, and X-rays allows the doctor or physical therapist to formulate an accurate diagnosis and propose the most suitable therapeutic path.

Conservative Treatment: Physiotherapy

Physiotherapy plays a crucial role in the conservative management of hallux valgus, with the aim of alleviating pain, improving function, and slowing the progression of the deformity. An individualized approach is essential.

Objectives of Physiotherapy

• Pain and Inflammation Reduction: Through physical and manual therapies.
• Improvement of Joint Mobility: Specifically of the big toe and surrounding joints.
• Muscle Strengthening: Of the intrinsic and extrinsic foot muscles to stabilize the plantar arch and the big toe.
• Postural and Gait Re-education: To optimize load distribution and foot biomechanics.
• Patient Education: On appropriate footwear, pain management, and exercises to perform at home.

Specific Hallux Valgus Exercises

Exercises are a fundamental component of conservative treatment. They must be performed regularly and with the correct technique to be effective.

• Exercises for Big Toe Mobility:

• Passive Mobilization: Use your hands to gently move the big toe into flexion, extension, abduction (away from the second toe), and adduction (towards the second toe). Hold each position for 10-15 seconds, repeating 5-10 times. This helps maintain capsulo-ligamentous elasticity.

• Assisted Active Mobilization: With the help of an elastic band or your fingers, push the big toe into abduction, trying to hold the position for a few seconds.

• “Toe Spreading”: Sitting, place your foot on the ground and try to spread your toes, moving the big toe away from the second toe. Hold the position for 5 seconds and relax. Repeat 10-15 times.

• Exercises for Strengthening Intrinsic and Extrinsic Foot Muscles:

• Short Foot Exercise: Sitting or standing, place your foot on the ground. Without curling your toes, try to “shorten” your foot by lifting the plantar arch and bringing the base of the big toe closer to the heel. This activates the intrinsic foot muscles. Hold for 5-10 seconds, repeat 10-15 times. This exercise is crucial for stabilizing the medial arch.

• Object Pick-up: Use your toes to pick up small objects (marbles, towels, pencils) from the floor and place them in a container. This improves dexterity and strength of the toe flexor muscles.

• Heel Raises (Calf Raises): Standing, rise onto the balls of your feet and hold the position for a few seconds, then slowly lower yourself. This strengthens the calf muscles, which are important for propulsion during walking.

• Elastic Band Exercises: Place an elastic band around the big toe and anchor it to a fixed point. Perform abduction movements against resistance. This strengthens the abductor hallucis muscle.

• Balance and Proprioception Exercises:

• Single-Leg Stance: Stand on one leg for 30-60 seconds, initially with eyes open, then with eyes closed. This improves balance and foot stability.

• Walking on Uneven Surfaces: Walk barefoot on sand, grass, or proprioceptive mats to stimulate the sensory receptors of the foot.

• Stretching:

• Calf Stretch: Place your hands on a wall, step one leg back, and push your heel to the ground, keeping the leg straight. Feel the stretch in your calf. Hold for 30 seconds, repeat 3 times per leg.

• Plantar Fascia Stretch: Sitting, cross one leg over the other and grasp the toes of your foot with your hand, pulling them towards your shin. Hold for 30 seconds, repeat 3 times.

Tips for progression: Start with a few repetitions and gradually increase the number and intensity of the exercises. Consistency is key. It is always advisable to perform these exercises under the guidance of a physical therapist, who can personalize the program and correct the technique.

Instrumental Physical Therapies

Can be used to manage pain and inflammation:

• Laser Therapy: Reduces pain and inflammation, promoting tissue regeneration.
• Tecar Therapy: Stimulates the body’s natural reparative processes, reducing pain and edema.
• Ultrasound: Useful for reducing local inflammation and pain, especially in cases of bursitis.
• Shockwave Therapy: Can be considered for treating chronic bursitis or refractory metatarsalgia.

Manual Therapy

The physical therapist can perform:

• Joint Mobilizations: To improve the mobility of the big toe and the midfoot and hindfoot joints.
• Myofascial Release Techniques: To reduce tension in the foot and leg muscles that can affect biomechanics.

Therapeutic Education

• Footwear Advice: Wear comfortable shoes with a wide toe box that allows the toes to move freely, low heels (maximum 2-3 cm), and good cushioning. Avoid narrow or pointed shoes.
• Pain Management: Apply ice in case of acute inflammation, rest from activities that aggravate pain.
• Activity Modifications: Adapt physical activities to reduce stress on the foot, choosing low-impact sports.

The Use of Orthoses and Braces

Orthoses and orthopedic insoles are important tools in the conservative treatment of hallux valgus, but it is fundamental to understand their functions and limitations.

Types of Orthoses

Hallux valgus orthoses are devices designed to realign the big toe and reduce pressure on the prominence.

• Night Splints: These are usually more rigid and hold the big toe in a correct position during sleep. The goal is to stretch retracted soft tissues and prevent further deviation. They do not correct the deformity, but can alleviate pain and slow progression.
• Daytime Orthoses: These are thinner and more flexible, designed to be worn inside shoes. They can be made of silicone (interdigital separators) or fabric with reinforcements. They help reduce rubbing, separate the big toe from the second toe, and better distribute pressure.
• Dynamic Orthoses: Some orthoses are designed to be worn during activity, offering active support.

Functions and Limitations: Orthoses can alleviate pain, reduce bursitis inflammation, and slow the progression of the deformity, especially in the initial stages. However, they are not able to correct an already consolidated bone deformity. Their effectiveness is greater if used consistently and in combination with an exercise program.

Custom Orthopedic Insoles

Insoles are orthoses placed inside shoes, custom-made to correct biomechanical alterations of the foot.

• Function: Insoles can support the plantar arch, control excessive pronation, and redistribute loads on the foot. This can reduce pressure on the head of the first metatarsal and the big toe, alleviating pain and improving stability.
• Indications: They are particularly useful in the presence of flat feet, excessive pronation, or associated metatarsalgia. They do not directly correct hallux valgus, but manage its biomechanical causes and related symptoms.

The choice of the most suitable orthosis or insole should be made in collaboration with the doctor or physical therapist, who will evaluate the patient’s specific needs.

Prevention of Hallux Valgus

Although genetic predisposition cannot be modified, preventive measures can be adopted to reduce the risk of developing hallux valgus or slow its progression.

• Footwear Choice: This is the most important preventive factor. Wear comfortable shoes with a wide toe box that allows the toes to move freely, low heels (maximum 2-3 cm), and a well-cushioned sole. Avoid narrow-toed shoes, high heels, and footwear that compresses the foot.
• Preventive Exercises: Regularly performing exercises for the intrinsic foot muscles (such as the “short foot exercise”) and for big toe mobility can help maintain strength and flexibility, counteracting the tendency towards deformity.
• Weight Management: Excessive weight increases the load on the feet, contributing to biomechanical stress and the progression of deformities.
• Posture and Foot Biomechanics Control: In cases of flat feet or excessive pronation, the use of custom orthopedic insoles can help correct biomechanics and prevent the onset or worsening of hallux valgus.
• Regular Check-ups: In case of family history or first signs of deformity, consult a doctor or physical therapist for an early evaluation and specific advice.

When to Consider Surgical Intervention

Surgical intervention for hallux valgus is generally a last resort, considered when conservative treatment has not been successful in controlling pain and improving function.

Indications for Surgery

• Persistent and Debilitating Pain: The main symptom justifying surgery. If pain is not alleviated by footwear modifications, physiotherapy, orthoses, or medication, surgery may be considered.
• Severe Deformity: When the deformity is very pronounced, causing significant problems with shoe fit, severe metatarsalgia, or secondary deformities of the lesser toes.
• Failure of Conservative Treatment: After an adequate period (usually 6-12 months) of well-conducted conservative treatment without significant improvement in symptoms.
• Severe Functional Limitation: When the deformity prevents the performance of normal daily or work activities.

Types of Interventions

There are over 100 surgical techniques for hallux valgus; the choice depends on the severity of the deformity, the patient’s age, the presence of osteoarthritis, and the surgeon’s preferences. The most common techniques include:

• Osteotomies: These are the most frequent procedures. They involve cutting and repositioning bones (metatarsal and/or phalanx) to correct alignment. Examples include Chevron, Scarf, Akin osteotomies.
• Arthrodesis: In cases of severe osteoarthritis of the metatarsophalangeal joint, the joint is fused to eliminate pain, sacrificing mobility.
• Soft Tissue Procedures: Sometimes combined with osteotomies, these procedures involve releasing or tightening tendons and ligaments to balance the joint.

Post-Operative Recovery and Rehabilitation

Recovery varies depending on the surgical technique. Generally, a period of rest and the use of a post-operative shoe or crutches are necessary for several weeks. Post-operative physiotherapy is essential for:

• Pain and Edema Management: With physical and manual therapies.
• Recovery of Joint Mobility: Starting with passive and active mobilizations.
• Muscle Strengthening: To restore strength to the foot and leg muscles.
• Gait Re-education: To regain normal and functional walking.

The rehabilitation pathway can last from 3 to 6 months, or even longer for complete recovery. Collaboration between surgeon, physical therapist, and patient is crucial for the success of the intervention.

Risks and Complications

Like any surgical intervention, that for hallux valgus also carries risks, including infections, delayed bone healing, recurrence of the deformity, joint stiffness, persistent pain, nerve damage, and scars. It is fundamental to thoroughly discuss the potential benefits and risks with the surgeon before making a decision.

Frequently Asked Questions (FAQ)