Clear

No pruriginous lesions have excoriations or crusts

Almost clear

Very small proportion of pruriginous lesions have excoriations or crusts (up to approximately 10% of all pruriginous lesions)

Mild

Minority of pruriginous lesions have excoriations or crusts (approximately 11-25% of all pruriginous lesions)

Moderate

Many pruriginous lesions have excoriations or crusts (approximately 26-75% of all pruriginous lesions)

Severe

Majority of pruriginous lesions have excoriations or crusts (approximately 76-100% of all pruriginous lesions)