Trigger finger is a condition where the baby's finger does not move smoothly or is "stuck", in more severe cases it cannot be extended at all, always curled in a position like the image of a "trigger".

Trigger finger or trigger finger in children is a condition in which the fingers have difficulty extending, do not extend naturally, or are painful when attempting to extend. Trigger finger in children is usually affected in the thumb or index finger because the tendon sheaths of these fingers are long.