the Efficacy of Hyperbaric Oxygen on Acute Ankle Sprain

Inclusion Criteria: * Unilateral ankle sprain; * Swelling, bruising, and pain at the site of the sprain; * Injury occurring within 72 hours; * MRI examination clearly shows ligament damage. Exclusion Criteria: * X-ray shows ankle fracture; * Ankle has skin lesions or skin diseases; * History of lower limb and pelvic surgery; * Obvious neurological or psychiatric disorders that may interfere with assessment; * Severe ligament injuries or joint instability requiring surgical treatment; * Previous ankle injuries, persistent pain or functional limitations; * Pneumothorax, severe emphysema, active bleeding, or other diseases with contraindications for hyperbaric oxygen therapy.