if you are sensitive to Benzoyl Peroxide or have very sensitive skin. This product may cause irritation. If excess irritation occurs, discontinue use. Ask a doctor or pharmacist before use if you are using any topical acne drugs at the same time or right after use of this product. This may cause irritation, characterized by redness, burning, itching, peeling or possibly swelling. Mild irritation may be reduced by using the product less frequently or in a lower concentration. If irritation becomes severe, discontinue use. If irritation still continues, consult a doctor.