Some of the oil becomes clogged, bacteria multiply, and inflammation results. A few have acne all their lives. Other causes include junk foods, oral contraceptives, allergies, stress, and heredity. If scales below the surface fill with sebum, whiteheads are formed. Canadian Eskimos, prior to 1950, never had acne.
Cleanliness is important.
Keep the skin washed and clean. Keep the infected area free of all oils. Wash or pat the face with lemon juice 3 times a day. Shampoo the hair frequently. Eat a good, balanced diet, exercise regularly, and get adequate sleep at night.