Skin surface is very easy to adhere to a variety of dust, dirt and microorganisms, etc., while constantly secrete sebum and sweat, if not cleaned in a timely manner easy to accumulate in the skin, blocking pores; in addition, modern people use computers for a long time, the role of computer radiation generated by electrostatic, so that the fluorescent screen surface adsorption of many airborne dust, people and computer distance is very close, dust will also be adsorbed on the skin, affecting the skin “breathing”, hindering its metabolism. Therefore must often keep the skin clean. Clean skin generally use soft water (because hard water contains more calcium and magnesium salts, easy to skin irritation), water temperature to 35-38 degrees is appropriate, too hot or too cold will produce adverse stimulation of the skin. The choice of skin cleansing products should pay attention to the acidity and alkalinity, too high alkalinity, easy to stimulate the skin, especially when suffering from dermatitis eczema. Facial skin exposure, generally should be cleaned once in the morning and once at night, after using the computer to clean the face can reduce the damage to the skin of radiation; hands should be cleaned before and after meals, stained with dust, dirt, wash at any time. Hot weather in summer, sweat / oil secretion more, you can take a shower once a day. And winter to 3-5 days a bath is appropriate. Too much cleaning will reduce the sebum content of the skin, destroy the sebum film, lose the protective and moisturizing effect on the skin, but to promote skin aging, or too dry skin caused by dry eczema.