0 | None | None |
1 | Mild (< 20 wheals/24 h) | Mild (present but not annoying or troublesome) |
2 | Moderate (20–50 wheals/24 h) | Moderate (troublesome but does not interfere with normal daily activity or sleep) |
3 | Intense (> 50 wheals/24 h or large confluent areas of wheals) | Intense (severe pruritus, sufficiently troublesome that it interferes with normal daily activity or sleep) |