Bursitis of the Foot & Ankle
Overview
Bursae are small, fluid-filled sacs that reduce friction between tendons, ligaments, and bone.
Bursitis is inflammation of one or more of these bursae, causing pain, swelling, and tenderness.
In the foot and ankle, bursitis is common because of high mechanical loads, repetitive motion, and shoe-related pressure.
Common locations include:
  • Retrocalcaneal bursa (between the Achilles tendon and calcaneus)
  • Subcutaneous calcaneal (Achilles insertional) bursa (superficial to the Achilles tendon)
  • Medial or lateral malleolar bursae
  • First metatarsophalangeal joint (bunion-related) bursa
  • Metatarsal head bursae (forefoot)
Bursitis can occur as an isolated condition or in association with deformities such as hallux valgus, Haglund’s deformity, or inflammatory arthropathies.


Etiology (Causes and Risk Factors)
Mechanical/Overuse Causes
  • Repetitive pressure or friction from footwear, running, jumping, or prolonged standing.
  • Improper shoes (tight heel counters, high heels, or rigid seams) that create localized pressure.
  • Abnormal biomechanics such as flatfoot or cavus foot leading to altered tendon pull.
Traumatic Causes
  • Direct blows or repetitive microtrauma (e.g., pressure from skating boots or running shoes).
  • Sudden increase in training intensity or activity level.
Inflammatory/Systemic Causes
  • Rheumatoid arthritis, gout, or other inflammatory arthropathies can inflame bursae.
  • Infection (septic bursitis) from penetrating trauma, ulceration, or hematogenous spread.
Structural Deformities
  • Haglund’s deformity (prominent posterosuperior calcaneus) predisposes to retrocalcaneal bursitis.
  • Hallux valgus deformity may create a medial bunion bursa.


Clinical Presentation
  • Pain localized to the involved bursa, aggravated by pressure or motion.
  • Swelling and erythema over the affected site.
  • Tenderness to palpation; fluctuance may be noted.
  • Reduced motion when inflamed bursa is adjacent to tendons or joints.
  • In septic bursitis: warmth, redness, possible drainage, and systemic symptoms such as fever.


Diagnosis
  • Clinical evaluation is primary: history of activity, footwear, and systemic illness is critical.
  • Physical examination localizes tenderness and swelling.
  • Imaging:
    • Ultrasound: sensitive for bursal fluid and can guide aspiration.
    • MRI: useful for deep bursae and to evaluate adjacent tendon or bone pathology.
  • Laboratory tests/aspiration: fluid analysis and culture are essential when infection is suspected.


Treatment
Management depends on whether bursitis is noninfectious or infectious.
Noninfectious (Mechanical/Inflammatory)
Conservative care (first-line)
  • Rest, ice, activity modification.
  • Shoe modifications: soft or open-back shoes, heel lifts, padding or orthoses to reduce pressure.
  • NSAIDs or other anti-inflammatory medications.
  • Physical therapy for flexibility, strengthening, and gait correction.
  • Heel cord stretching for retrocalcaneal bursitis.
Procedures
  • Aspiration or corticosteroid injection for persistent symptoms unresponsive to conservative care (performed with caution around Achilles tendon to avoid rupture).
Surgical management
  • Bursectomy or removal of bony prominence (e.g., calcaneal exostectomy for Haglund’s deformity) in refractory cases.
Infectious (Septic) Bursitis
  • Requires prompt antibiotic therapy targeted to cultured organisms.
  • Drainage or surgical debridement may be necessary if abscess or cellulitis is present.


Expectations and Prognosis
  • Most cases resolve with conservative care within several weeks to a few months if aggravating factors are addressed.
  • Return to activity is usually gradual as pain subsides and swelling resolves.
  • Prognosis is excellent for isolated mechanical bursitis when footwear and activity modifications are made.
  • Chronic or recurrent bursitis may occur if underlying biomechanical problems or shoe pressures persist.
  • Surgical outcomes are generally good when indicated but require postoperative rehabilitation and footwear adjustment.
  • Septic bursitis carries a higher risk of complications and requires timely treatment to prevent spread to adjacent joints or tendons.


Key References (Peer-Reviewed)
  1. Lohrer H, Nauck T. Retrocalcaneal bursitis: treatment options and review of the literature. Br J Sports Med. 2010;44(11):839–846.
  2. Kane SF, O’Connor FG. Bursitis of the foot and ankle. Clin Sports Med. 2015;34(4):725–739.
  3. Frey C, Kerr R. Bursitis of the foot and ankle. J Bone Joint Surg Am. 1993;75(9):1407–1415.
  4. Park H, Lee HS, Lee DH. Surgical treatment of refractory retrocalcaneal bursitis and Achilles tendinopathy. Foot Ankle Int. 2015;36(8):944–949.
  5. Baumbach SF, et al. Haglund’s deformity: etiology, diagnosis, and treatment. Foot Ankle Clin. 2019;24(3):515–530.
  6. Ho G Jr, Tice AD. Comparison of nonseptic and septic bursitis: etiology, clinical features, and therapy. Arch Intern Med. 1979;139(11):1269–1273.


Summary
Bursitis of the foot and ankle is inflammation of one or more protective bursae caused by pressure, overuse, trauma, or inflammatory disease.
Most cases respond to conservative treatment such as footwear modification, rest, anti-inflammatory therapy, and physical therapy.
Septic bursitis requires urgent antibiotics and sometimes surgery.
When managed appropriately, the prognosis is excellent, with most patients regaining full comfort and function.