Wong-Baker Faces Rating Scale for pain is a commonly used tool in assessing pain among young children who can relate better with pictures in describing the pain. A numeric rating scale is a common and simple tool used generally for adult patients who will just define the pain in terms of numbers, that is, 0 for no pain towards 10 for worst pain imaginable. CRIES (crying, requires oxygen, increased vital signs, and expression) is a complementary tool in assessing pain among infants. Verbal rating scale is a pain assessment tool in which patient just uses common words to describe pain such as mild, severe, and excruciating.