The dark redness around the white center of the bridge of the nose may be caused by seborrheic dermatitis, rosacea, butterfly erythema, and so on. 1. Seborrheic dermatitis: the cause of the disease is not clear, it may be related to the colonization of Malassezia bacteria, impaired skin barrier function, increased lipids, etc., which may cause erythema on the cheekbones, nasolabial folds and beard area, and may also have the manifestation of dark redness around the middle white of the bridge of the nose. 2. Rosacea: is a kind of chronic inflammatory skin disease that develops in the middle of the face, with persistent erythema and capillary dilatation as the main manifestations. The pathogenesis is still unclear, and it may be related to the genetic factors, skin immune function, and vascular constriction function abnormality, which will also lead to dark red around the middle of the bridge of the nose. 3. Systemic lupus erythematosus (SLE): it is an immune disease with symmetrical erythema on both cheeks connected to the bridge of the nose, which can also lead to the phenomenon of redness around the center of the bridge of the nose. There may be other reasons for the white color in the middle of the bridge of the nose and the dark red color around it. It is recommended to go to the hospital for examination, to clarify the cause of the disease and to treat it positively.