| Pain intensity | By verbal expression | By nonverbal expression |
| 0 | No pain | No expression on the face |
| 1 - 2 | Mild pain | Stressful appearance |
| 3 - 4 | Moderate pain | Frowning appearance |
| 5 - 6 | Severe pain | Groaning, moaning |
| 7 - 8 | Very severe pain | Crying |
| 9 - 10 | Worst pain possible | Miserable pain |