Sodium chloride is applied to the face, mainly to effectively cleanse the skin, remove oil from the face and prevent acne. Its correct method is: first, the hands should be washed clean. Because hands are very easy to stick to bacteria, dirty hands are not good for washing face. Secondly, you can wash your face with a face wash first, depending on the nature of each person’s skin to choose a different nature of face wash. If necessary, you can also choose one under the guidance of a doctor. Afterwards, apply the salt water to the skin of the face like a cleanser, except for the eyes. Gently massage in circular motions, using light pressure on your hands, and then rinse with water. For people with oily skin, or those who wear makeup every day, you can wash your face with salt once a day in the summer, preferably at night before going to bed. Patients with dry or normal skin should wash every 2-3 days. However, it should not last too long to avoid damage to the skin of the face. In addition to this facial compress, you should also pay attention to daily life, eat less spicy and other stimulating foods, and avoid alcohol. In addition, you should also maintain a relaxed mood, self-regulation, quit bad habits, avoid staying up late, drink more water, eat more fresh fruits and vegetables, and develop a regular bowel habit.