Article in English: Although blackheads are not actually caused by dirt, gently wash your skin regularly to remove excess dirt and oil. This can help prevent blackheads from forming or clogging pores.  Use a gentle cleanser with a neutral pH. You may also look for cleansers with salicylic acid, which can be very helpful in keeping pores clean and preventing breakouts.  Most grocery stores and pharmacies carry skin cleansing products that avoid irritating skin. Look for products labelled "gentle on skin", "for sensitive skin" and such. If your skin is very oily, consider using an oil-free cleanser. Likewise, if your skin is dry, try using a glycerine or cream-based cleanser.  Don’t use bar soaps as their ingredients may clog pores.  Use lukewarm water to wash your skin. Water that is too hot can strip your skin of oils and irritate it. Just as it’s important to wash your skin, it’s also important to not overwash it. Cleansing too often or too vigorously can irritate your skin, strip its oil, and actually lead to further breakouts. Washing acne-prone areas twice a day is sufficient to help keep it clean and prevent blackheads. Going to bed with makeup or cosmetic products on your skin can clog your pores. Remove all makeup or cosmetics with a gentle cleanser or makeup remover before you hit the pillow.  You can use a specific makeup remover, especially if you use waterproof products, or your gentle cleanser before bed. Most cleansers are effective at removing makeup.  Every month, you may want to consider cleaning your makeup applicators or cosmetic sponges with some soapy water to remove bacteria that can clog pores. If you are a very active person, shower after strenuous activities. Sweating can lead to excess bacteria and oil on your skin that could cause blackheads. Avoid washing your blackhead prone areas with harsh soaps. A gentle, pH balanced skin wash will suffice.

Summary in Vietnamese:
Rửa mặt hàng ngày. Tránh lạm dụng rửa mặt. Tẩy trang trước khi đi ngủ. Tắm rửa sạch sẽ sau khi vận động cơ bắp.