How to wash your face to clean it? Have you fallen into these face washing misunderstandings?

Some people like to wash their face with hot water first and then with cold water. They feel their skin is tighter instantly after washing. This is because of the principle of thermal expansion and contraction. Cold water can shrink the subcutaneous capillaries and temporarily shrink the pores, thus having a skin tightening effect. This skin tightening effect is only temporary. When the skin returns to normal, the pores and skin will still return to their previous state. Long-term hot and cold stimulation may even cause sensitive skin.

Many people believe that milk and rice water have the effects of cleansing, softening and whitening the skin. However, the human face is not the stomach, and large molecules such as protein are difficult to be absorbed directly. What's more, applying protein does not necessarily make your skin whiter, and some people are born allergic to milk. The brightening effect you get after washing your face with rice water is most likely just a temporary residue of starch in the water, just like applying a layer of powder. The effect is only temporary. However, if this layer of powder blocks the pores, it will be detrimental to the health of the skin.

Some people add a few drops of white vinegar or lemon juice when washing their face, believing that the fruit acids in lemons are good natural exfoliants that can soften the skin. But this way of washing your face will bring more problems. Exfoliation needs to be based on individual skin type. If it is dry skin, the skin metabolism is slow and once a month is enough. If it is oily skin, once or twice a week is more appropriate. The exfoliating ingredients in natural products have different concentrations when formulated for individual use, so it is difficult to generalize their effectiveness.