Nursemaid's Elbow, or "pulled elbow," occurs in small children as a result of being lifted, yanked, swung by the hand or wrist, or falling on an outstretched arm. One of the arm bones slips out of place slightly.
Coping with a colicky baby can be terribly difficult for parents. Remember that colic is common and it won't last forever. It starts at approximately 3 weeks of age and is usually gone by the time a baby is 3 months old.