After shaving, there is a pigmentation, removal methods include medication, physical therapy and so on. Generally, after shaving, there is a blue beard, mostly due to local stimulation, resulting in increased secretion of melanin particles, melanin precipitation. 1. Medication: You can use some antioxidant drugs, such as vitamin C cream, vitamin E cream, etc., to reduce the production of melanin, so as to reduce hyperpigmentation; you can also use topical decolorant treatment, such as arbutin cream, niacinamide, azelaic acid cream, etc., to lighten the hyperpigmentation. 2. Physical therapy: Carbon dioxide laser treatment can be used to remove pigmentation and improve skin condition by crushing melanin particles through the high energy generated by the laser; strong pulsed light treatment can also be taken to reduce pigmentation. It is recommended that patients according to their own situation, if necessary, to the regular hospital dermatology consultation, under the guidance of the doctor’s reasonable use of medication, not blindly self-medication.