High-pressure injection injuries are reported often in the hand and occasionally in the foot. Injection with water and air causes minimal tissue damage but nevertheless requires irrigation, minimal debridement, administration of antibiotics, and concern for development of compartment syndrome. The outcome for patients injected with water and air should be excellent. Adjunctive hyperbaric oxygen causes immediate resolution of subcutaneous emphysema, edema, and pain for more rapid rehabilitation.

Calhoun, Gogan, Viegas, Mader, , , , , (1989). Treatment of high-pressure water gun injection injury of the foot with adjunctive hyperbaric oxygen: a case report. Foot & ankle, 1989 Aug;10(1):40-2. https://www.ncbi.nlm.nih.gov/pubmed/2570010