How are flexor tendon injuries treated? Flexor tendon injuries are repaired primarily whenever possible. Repair should be completed within 1 to 2 weeks after injury. What are the causes of flexor tendon injuries? Flexor tendon injuries are most commonly caused by a sharp cut to the finger or palm. Rupture of the attachment of the tendon to the finger can also occur and is commonly associated with recreational sports (such as tackling in football when the tackler's finger becomes entangled in the opponent's jersey). Flexor tendon injuries can also occur as part of a more severe injury, such as due to power equipment.
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