Acne is typically classified into four main levels of severity, which are:

1. Mild Acne: Characterized by whiteheads, blackheads, and small pimples. This type of acne is often easily treatable with over-the-counter products.

2. Moderate Acne: Involves more inflamed pimples and papules in addition to whiteheads and blackheads. Moderate acne may require prescription treatments from a dermatologist.

3. Severe Acne: Includes nodules and cysts along with a higher number of inflamed pimples and papules. Severe acne can lead to scarring and usually requires medical intervention for treatment.

4. Very Severe Acne: Also known as cystic acne, this level is characterized by deep, painful cysts and nodules that often cause extensive scarring. Treatment for very severe acne usually involves strong medications prescribed by a dermatologist.

These are general classifications, and it’s essential to consult a dermatologist to accurately assess and treat specific acne conditions.