| Criterion |
ICDRG Notation |
Score |
| No reaction |
0 |
0 |
| Doubtful reaction |
± |
0.5 |
| Erythema and oedema |
+ |
1 |
| Erythema, oedema and vesicles |
++ |
2 |
| Severe reaction with blisters |
+++ |
3 |