Rinse well after washing, as residual soap can irritate the skin. Oily hair that comes in contact with face, neck, and shoulders adds to skin surface oil on the forehead, cheeks, nape of the neck, and upper back. It contributes to clogging the surface of the pores. Benzoyl peroxide helps kill skin bacteria, unplug the oil ducts, and heal acne pimples. It is the most effective acne treatment you can get without a doctor's prescription.
Many brands are available.
After a week, increase use to twice a day if your skin isn't too red or peeling. Apply a thin film to the entire area where pimples may occur. Don't just dab it on current blemishes. Avoid the delicate skin around eyes, mouth and corners of the nose. Start with one application each day and increase to two daily applications if your skin tolerates it.