People whose faces are prone to fever and redness have thin cuticles and are more sensitive. From cold to hot, or from hot to cold, when you are emotional, your face will turn red, and serious people will have pigmentation, which is difficult to cure, not only affecting the appearance, but also causing psychological impact, which will bring great inconvenience to normal life. Facial redness is directly related to the blood circulation of the body. Wind and sun exposure, high temperature stimulation lead to vasodilation, or blood stasis blocks meridians, poor blood circulation, and blood stasis blocks skin, all of which can dilate blood vessels and cause facial redness and swelling. Poor blood circulation makes it difficult for toxins in the body to be excreted, and it will also form red blood. Poor blood circulation is also directly related to the lack of vitamins and trace elements in the body. The lack of these substances directly causes the capillary wall to lose elasticity and cause dilation. The causes of red blood silk can be roughly divided into two categories, hereditary and induced. Heredity is mostly familial and induced, and the common reasons are as follows: First, local long-term use of corticosteroids causes telangiectasia, resulting in thinning and atrophy of skin. Second, the blood circulation is blocked and the blood vessel wall is stagnant, which makes the face bloodshot. Third, taking skin care products containing hormones or pharmaceutical ingredients causes skin damage. Fourth, considering the sensitive skin itself, it is relatively sensitive to external stimuli, which leads to the relaxation of peripheral circulation, which is manifested as congestion and redness.