Freiberg's Syndrome: Symptoms, Causes and Treatments of Metatarsal Necrosis
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Do you feel persistent pain under the forefoot, especially when walking or wearing heels? This discomfort, located around the second or third toe, may indicate a Freiberg's syndrome. This metatarsal condition, caused by bone necrosis, mainly affects teenage girls and young adults involved in repetitive impact activities. We explain how to identify this condition, understand its mechanisms, and discover therapeutic solutions adapted to each stage of its progression.
What is Freiberg's syndrome?
Freiberg's syndrome refers to osteonecrosis of the head of a metatarsal bone. Specifically, the bone stops being properly supplied with blood and gradually dies, leading to flattening and then deformation of the joint. The second metatarsal is affected in 68% of cases, followed by the third in 27% of situations. This location is explained by the particular mechanical stresses applied to these areas during the foot's propulsion.
This condition belongs to the family of osteochondroses, which include abnormalities of bone and cartilage growth. The head of the metatarsal gradually loses its natural sphericity and takes on a flattened and irregular shape, compromising the mobility of the metatarsophalangeal joint.
What are the symptoms of metatarsal necrosis?
Metatarsal pain is the main clinical sign of Freiberg's syndrome. This mechanical pain intensifies during weight-bearing activities: prolonged walking, running, dancing, or wearing high-heeled shoes. We observe that patients often describe a sensation of a "pebble in the shoe" located precisely under the base of the second toe. This clinical presentation sometimes resembles metatarsalgia, requiring an accurate differential diagnosis.
The intensity of the pain varies depending on the stage of progression. In the early stages, the discomfort remains moderate and intermittent. As the necrosis progresses, the pain becomes constant and can occur even at rest or during the night, indicating active inflammation. This progression justifies seeking medical advice as soon as the first symptoms appear.
The relief obtained by removing shoes and resting the foot is a guiding diagnostic element. This mechanical feature distinguishes Freiberg's syndrome from other inflammatory conditions of the foot.
Observable physical signs
The clinical examination reveals several specific signs. Localized swelling frequently appears at the level of the affected metatarsophalangeal joint. This swelling, associated with heightened tenderness to touch, reflects periarticular inflammation accompanying bone necrosis.
Passive mobilization of the toe triggers significant pain. We also observe a progressive limitation of joint range of motion, making complete flexion of the toe difficult. This stiffness worsens with progression towards osteoarthritis and can lead to an almost complete blockage in advanced cases.
In 15 to 20% of cases, the condition affects both feet simultaneously. This bilateral involvement requires a comprehensive evaluation of the entire foot system to identify any potential predisposing anatomical factors.
What are the causes of Freiberg's syndrome?
Freiberg’s syndrome originates from an interruption of blood supply to the metatarsal head. The small arteries that nourish this bone become blocked or suffer repeated damage, gradually depriving the bone tissue of oxygen and nutrients. This ischemia (lack of blood supply) causes cell death and the progressive collapse of the bone structure.
We identify two main triggering factors. Repeated microtraumas place excessive strain on the metaphysis and the metatarsal growth plate. These abnormal stresses compress the blood vessels and disrupt local circulation. In addition, spontaneous vascular disorders may compromise the blood supply without any apparent trauma.
The affected area flattens and fragments in several stages. The metatarsophalangeal joint gradually loses its congruence (perfect alignment between the joint surfaces), encouraging the early onset of disabling osteoarthritis. Without appropriate treatment, this deterioration accelerates and permanently impairs joint function.
Anatomical and Functional Risk Factors
Certain morphological features predispose to the development of Freiberg's syndrome. An abnormally long second metatarsal (Greek foot) or a short first metatarsal increases the mechanical stress on the second joint. This anatomical configuration, present from birth, triples the risk of developing metatarsal necrosis.
Sports activities involving repeated impact are a major aggravating factor. Ballet, running on hard surfaces, intensive jogging, and sports involving repeated jumping place considerable pressure on the metatarsal heads. Dancers in training account for 25% of our patients affected by this condition.
Hormonal changes during puberty also influence bone vulnerability. This period of rapid growth temporarily weakens the osteoarticular structures, making the metatarsals more sensitive to mechanical stress. The peak incidence between ages 13 and 16 in young girls is explained by this window of increased vulnerability.
How to diagnose Freiberg's disease?
The diagnosis of Freiberg's syndrome begins with a detailed interview and a thorough physical examination. We systematically look for a history of athletic activity, characteristics of the pain (timing, triggering factors, progression), and any past trauma. Precise palpation of the forefoot helps to pinpoint the exact painful area and assess the degree of joint swelling.
Passive mobilization of the metatarsophalangeal joint reveals a limitation in range of motion and reproduces the characteristic pain. We also carry out a complete podiatric assessment to identify associated morphological abnormalities: relative length of the metatarsals, presence of hallux valgus, evaluation of the plantar arch. These elements help guide the differential diagnosis and inform the therapeutic strategy. An appointment with a podiatrist can supplement this initial evaluation.
What are the postoperative phases and recovery?
The procedure is performed as outpatient surgery in the majority of cases. You return home the same evening after the operation, once your autonomy and the effective management of postoperative pain have been verified. It is necessary to be accompanied by a close relative for the return home and during the first days following the surgical procedure.
The operated foot remains immobilized in a semi-rigid dressing, which you keep on for 2 to 3 weeks without removal. Weight-bearing is allowed immediately using a rigid-soled offloading shoe, an essential device for 6 weeks to protect the surgical assembly and promote bone healing. This specific shoe distributes pressure to the back of the foot and completely relieves weight from the operated forefoot.
Physical therapy sessions begin around the third week after surgery. The physiotherapist progressively works on joint mobilization, lymphatic drainage to reduce swelling, and restoring physiological weight-bearing. This care continues for 2 to 3 months depending on individual progress and the surgical technique used.
Resuming driving is possible after a minimum of 4 weeks for the right foot, and immediately for the left foot with an automatic vehicle. The period off work ranges from 6 to 9 weeks depending on the occupation: minimum duration for sedentary activities, with a longer period required for jobs involving prolonged standing or lifting. Sports activities can gradually be resumed from the third month, with cycling and swimming allowed from the sixth week. Residual swelling in the foot may persist for 4 to 6 months, a normal occurrence that should not cause concern.
Frequently Asked Questions
Spontaneous healing remains exceptional after adolescence. In patients under 15 years old, strict non-weight bearing for 8 to 12 weeks may allow partial revascularization and stabilization of the lesions in 30% of cases. After this age, the necrosis systematically worsens without appropriate treatment. However, we do observe minimally symptomatic forms, discovered incidentally on X-rays performed for another reason, which do not require any intervention if there is no pain.
Return to sports varies according to the discipline. Cycling and swimming are allowed from the sixth postoperative week. Walking sports (hiking, golf) can resume at 3 months. For impact activities (running, dancing, team sports), we recommend waiting at least 4 to 5 months. This gradual approach allows for optimal bone healing and prevents mechanical complications. An X-ray check-up at 3 months systematically validates full authorization to resume sports.
Simultaneous involvement of several metatarsals on the same foot remains rare, observed in less than 5% of cases. However, bilateral involvement (both feet) concerns 15 to 20% of patients, justifying a systematic X-ray assessment of the contralateral foot, even if asymptomatic. This particularity is explained by predisposing anatomical factors (metatarsal length) which usually affect both feet. Early detection of beginning necrosis in the contralateral foot allows for the rapid initiation of effective preventive treatment.
The fixation hardware (screws or wire) generally does not need to be removed. Titanium or resorbable screws are permanently integrated without functional discomfort. Removal becomes necessary only in case of hardware conflict (painful protrusion under the skin) or at the specific request of the patient, a situation encountered in less than 3% of cases. This second minimally invasive intervention, performed under local anesthesia, requires only one day of hospitalization and allows for immediate weight-bearing without any particular restriction.
The pyrocarbon implants we use offer excellent longevity. Studies at 10 years show a prosthetic survival rate of 92%, with continued pain relief and joint mobility. Unlike hip or knee prostheses, these implants are subject to moderate mechanical stress, limiting wear. Prosthetic replacement may become necessary after 15 to 20 years in case of wear or loosening, a technically feasible intervention without major complication. Therefore, a patient's young age is not a contraindication to this effective therapeutic solution.
The final word
Freiberg’s syndrome requires early and appropriate management to preserve joint function and limit progression towards osteoarthritis. Conservative medical treatments offer good results in early stages, while current surgical techniques allow lasting restoration of comfort and mobility in advanced stages. Our expertise in minimally invasive foot surgery enables us to offer personalized solutions, taking into account the evolutionary stage of your condition and your functional goals. In the face of persistent metatarsal pain, a prompt specialist consultation optimizes the chances of recovery and prevents long-term complications.