The Neonatal Infants Pain Scale (NIPS) is used to evaluate pain in infants less than one year old who cannot verbally communicate pain levels. It scores infants on a scale from 0-1 in categories like facial expressions, cry, breathing, and body movements to calculate a total pain score. A score over 3 typically indicates the infant is experiencing pain or discomfort. The scale was adapted from the CHEOPS scale and uses behaviors nurses describe as signs of infant pain. It can be used to monitor the effectiveness of pain interventions in young children.