Redness on the head of the nose may be caused by rosacea, seborrheic dermatitis, etc. It can be dealt with by general treatment, topical medication, systemic medication, physical therapy and other measures. 1. Rosacea: the etiology is unknown, it can cause persistent erythema and capillary dilatation on the face, so it can cause red blood on the head of the nose. (1) General treatment: Avoid excessive cleansing to destroy the skin barrier, as well as paying attention to sun protection, avoiding too cold and spicy food, and avoiding mental stress. (2) Topical medications: Commonly used medications include fusidic acid cream, lincomycin ointment, metronidazole gel, benzoyl peroxide gel and so on. (3) Systemic medication: doxycycline, minocycline, isotretinoin, etc. (4) Physical therapy: LED red light, long pulse laser, dye laser and other measures can be taken. 2. Seborrheic dermatitis: the cause of the disease is not yet clear, and Malassezia colonization, impaired skin barrier function, increased lipid secretion. (1) General treatment: Ensure sufficient sleep, regular diet, limit the fat and sugar food, quit smoking and alcohol. (2) Topical medication: commonly used medications include sulfur ointment, salicylic acid ointment, dexamethasone cream, tretinoin ointment, etc. (3) Systemic medication: loratadine can be chosen when itching is severe; itraconazole can be taken for fungal infection; tetracycline erythromycin for bacterial infection. The head of the nose has red blood, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions to standardize the treatment, the drug needs to be used under the guidance of the doctor.