Hello! The method for treating rosacea in the "Compendium of Materia Medica" is "rubbing with white salt for half a minute every day." Rosacea, commonly known as red nose or red nose, is a chronic inflammatory skin disease that occurs on the face. Use raw water chestnuts to treat rosacea. Cut the washed raw water chestnuts at the waist with a sterilized blade (the blade can be sterilized with boiling water), and then rub the cut surface close to the top of the affected nose, the small nose wings on both sides and other parts to remove the water chestnuts. Apply the white powder paste all over the affected nose surface. Apply once a day in the morning and evening. The effect will be seen after 4 weeks.