Grade Severity Symptoms Symptoms Symptoms
0 Clear Residual hyperpigmentation and erythema may be present Residual hyperpigmentation and erythema may be present Residual hyperpigmentation and erythema may be present
1 Almost Clear A few scattered comedones and a few small papules A few scattered comedones and a few small papules A few scattered comedones and a few small papules
2 Mild Easily recognisable; less than half the face is involved. Some comedones and some papules and pustules Easily recognisable; less than half the face is involved. Some comedones and some papules and pustules Easily recognisable; less than half the face is involved. Some comedones and some papules and pustules
3 Moderate More than half the face is involved. Many comedones, papules and pustules. One nodule may be present More than half the face is involved. Many comedones, papules and pustules. One nodule may be present More than half the face is involved. Many comedones, papules and pustules. One nodule may be present
4 Severe Entire face is involved, covered with comedones, numerous papules and pustules, and few nodules and cysts Entire face is involved, covered with comedones, numerous papules and pustules, and few nodules and cysts Entire face is involved, covered with comedones, numerous papules and pustules, and few nodules and cysts
Investigator Global Assessment (IGA) of acne severity 43 Investigator Global Assessment (IGA) of acne severity 43 Investigator Global Assessment (IGA) of acne severity 43