Getting pain assessment right in kids is harder than you'd think. Young children can't tell you where it hurts or how much, but there are solid tools for every age group, and using them consistently changes how well you manage pain.
Matching the Scale to the Age
CRIES (neonates, 32 weeks GA through 6 months)
In NICUs, CRIES (Crying, Requires oxygen, Increased vitals, Expression, Sleeplessness) is the standard for postoperative neonatal pain. Five signs, each scored 0–2, give you a 0–10 total. It's behavioral, quick, and validated for neonates from 32 weeks gestational age through approximately 6 months of life.
The calculator handles the math. Use it consistently across your team; one person's 6 is another's 4 without clear criteria.
FLACC (2 months to 7 years)
This is the gold standard for kids who can't talk yet. FLACC looks at Face, Legs, Activity, Cry, and how easily they console: five domains, each 0–2, totaling 0–10. Works for acute post-op pain and chronic issues. It's behavioral, which cuts down on the guessing game.
The strength is objectivity. You're watching what the kid is doing, not interpreting the story. Some studies even show FLACC correlates better with vital sign changes than what parents report.
Wong-Baker (3 to 7 years)
Once kids start pointing, you can use the Wong-Baker FACES scale: six faces from smiling to grimacing. They pick the one that matches. It works in a busy clinic, takes 10 seconds, and kids actually understand it.
Numeric or Verbal Scales (8 years and up)
By school age, most kids can handle 0–10 or "mild/moderate/severe." That lets you track them over time and compare to how they described pain before.
In Sedated, Ventilated Kids
COMFORT-B
When a kid's on a vent and sedated, you can't ask them about pain. COMFORT-B gives you six scored domains: alertness, calmness, movement, muscle tone, facial tension, and how they respond to procedures, each rated 1–5, totaling 6–30.
Higher scores mean inadequate sedation or pain. It's well-validated in PICU populations and actually predicts outcomes. Use it the same way every shift.
Ramsay Sedation Scale
The Ramsay is simpler: just a 1–6 scale measuring how awake the kid is, from awake/agitated down to unresponsive. Less nuanced than COMFORT-B, but it's fast and tells you immediately if your sedation depth is where you want it.
Catching Withdrawal
WAT-1
Long sedation runs set kids up for withdrawal when you start weaning. WAT-1 is a 12-item checklist that separates withdrawal (tremor, agitation, high heart rate) from pain, inadequate sedation, or fever. Scores above 2–3 raise red flags.
Get this wrong and you'll jack up sedatives when you should be tapering them. Catch it early and adjust thoughtfully.
Putting It Into Practice
Build a protocol that specifies which scale goes with which age and situation. Your nurses and docs should know what pain score of 6 means: is that kid getting another dose, or are they okay? Train everyone the same way, use the calculators, reassess after you intervene.
The point is consistency and catching pain you might otherwise miss.
Use CRIES for neonates, FLACC for preverbal kids, Wong-Baker for ages 3–7, numeric scales for 8+. In sedated patients, use COMFORT-B for pain and FLACC-equivalent assessment; Ramsay for depth; WAT-1 for withdrawal. Done well, it matters.