Redness in the nasal sulcus is a relatively common skin reaction in dermatology, and there are many reasons that can cause skin redness, the most common reasons in clinical dermatology are the following: 1, seborrheic dermatitis, due to abnormal oil secretion or fungal infection in the T-shaped area of the face, especially on both sides of the nasal sulcus will appear erythema, desquamation, and in severe cases, oozing night. 2, allergic dermatitis, patients because of the use of bad The skin of the patient will be red because of the use of bad cosmetics, or eating allergy-prone food. 3, skin trauma, the nasal sulcus area if there is a needle prick injury or trauma will lead to red skin. 4, cold patients repeatedly wipe the nose will also lead to local skin redness, because of repeatedly squeezing, scratching the nasal sulcus and appear.