Above the mouth crusted red marks in medicine can be called post-inflammatory hyperpigmentation, due to the different physique of each person, so there is no fast elimination of post-inflammatory hyperpigmentation method, but can take medication, physical therapy and other ways to improve. 1. Medication: For patients with post-inflammatory hyperpigmentation, it is recommended to use drugs such as tranexamic acid and azelaic acid externally as prescribed by the doctor, which can inhibit the production of melanocytes and lighten the hyperpigmentation. 2. Physical therapy: including intense pulsed light, fractional laser and other laser treatments, is based on the photothermal effect, the release of laser light to flatten the scar, lighten the color of hyperpigmentation and so on. Patients with scabs and red marks on the top of the mouth are advised to go to regular hospitals and cooperate with doctors for standardized treatment.