A finger sprain is the stretching or tearing of ligaments that support the small joints of the finger. Ligaments are strong bands of tissue that connect bones to each other.

Finger Sprain
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A finger sprain usually results from a blow to the finger causing the finger to bend too much or in the wrong direction. This often occurs during athletic activity when an athlete jams a finger into another person, the ball, or piece of equipment. Finger sprains may also occur in other situations, such as falling on the hand..