Herpes itself is a viral disease that may damage the dermis, so after the herpes disease has healed, it may leave red changes called persistent erythema. Persistent erythema can be left untreated and will gradually fade within six months to two years. The red color will first turn to brown, then brown to black and eventually fade away. If you feel that the fading is too slow, you can choose to use topical ointment to remove redness quickly, you can apply mucopolysaccharide polysulfate cream with hyaluronic acid gel, which can effectively accelerate local blood circulation, so as to achieve the purpose of treatment. If you feel that the effect is slow, you can also choose to use Feidun 540 laser or Q532 laser, which can achieve the purpose of rapid redness removal, but there is a certain amount of stimulation to the skin, and later you need to apply recombinant human epidermal growth gel to protect the skin.