Reddish-purple birthmark can be removed by physical therapy and surgery. 1. Physical therapy: For patients with reddish-purple birthmarks, it is recommended to adopt laser therapy, which releases high-energy laser through the photothermal effect to smash the pigment particles in the affected area, so as to achieve the effect of removing birthmarks. In addition, you can also choose cryotherapy, through liquid nitrogen freezing to achieve the effect of removing birthmarks. 2. Surgery: If the local birthmark has a tendency to become malignant, it needs to be treated with surgery such as excision and suture, skin grafting, skin flap method and skin expansion, but there may be scarring after the surgery. There are many ways to remove reddish-purple birthmarks, we suggest that patients go to regular hospitals and cooperate with doctors for standardized treatment.