Clear
No inflammatory or non-inflammatory nodes
Minimal
Only non-inflammatory nodules present
Mild
Less than 5 inflammatory nodules or 1 abscess or a draining fistula and no inflammatory nodules
Moderate
5 or more inflammatory nodules but no abscesses or draining fistulas or 1 abscess or draining fistula and 1 or more inflammatory nodule or 2 to 5 abscesses or draining fistulas and fewer than 10 inflammatory nodules
Severe
2 to 5 abscesses or draining fistulas and 10 or more inflammatory nodules
Very severe
More than 5 abscesses or draining fistulas
Less than 5 inflammatory nodules
or
1 abscess or a draining fistula and no inflammatory nodules
5 or more inflammatory nodules but no abscesses or draining fistulas
1 abscess or draining fistula and 1 or more inflammatory nodule
2 to 5 abscesses or draining fistulas and fewer than 10 inflammatory nodules