Table 2 Yunus and Masi suggested diagnostic criteria for Juvenile Primary Fibromyalgia Syndrome [3]

Major criteria

1) Generalized musculoskeletal aching at 3 or more sites for 3 or more months

2) Absence of an underlying condition/cause

3) Normal laboratory tests

4) Five or more typical tender points^a

Minor criteria

1) Chronic anxiety or tension

2) Fatigue

3) Poor sleep

4) Chronic headaches

5) Irritable bowel syndrome

6) Subjective soft tissue swelling

7) Numbness

8) Pain modulated by physical activities

9) Pain modulated by changes in weather

10) Pain modulated by anxiety/stress

JPFS is diagnosed when all major criteria are met, plus three of the minor criteria or when there are four tender points and five minor criteria.