A: Erb's palsy is a nerve injury that happens to a baby at the time of birth. The injury usually causes damage to an arm because of difficulty with getting the baby out during a delivery. Depending on how severe the erb's palsy is, the injury could range from a temporary paralysis (inability to move an arm) for a short time, or if more severe, could be permanent. There are other types of nerve injuries that occur at birth including brachial plexus injury and klumpke's palsy. If your child has some type of nerve injury to their arm after birth, you should speak to an experienced trial attorney immediately.