The redness of the face after using skin care products needs to be distinguished whether it is the first time you use this skin care product or the second time you use this skin care product. If it is the first time you use a skin care product, the redness is caused by irritation, a flush caused by certain substances in the skin care product stimulating the skin surface. You can choose to use hyaluronic acid gel or human-like collagen milk to relieve the symptoms, and you can also choose to use cold water ice packs can also achieve the purpose of removing red. If you are using this skin care product for the second time to cause redness, you should consider that it is caused by allergic factors, the skin care product second contact with the skin, so that the mast cells that are about to break down are broken, thus triggering a flushed state. It is recommended to take oral cetirizine tablets or loratadine tablets and then apply dehumidifying and anti-itch cream on the face for treatment.