Laser therapy: Laser is a widely used method to remove freckles, moles and birthmarks. Generally, we can consider using laser to remove small birthmarks, but we must pay attention to prevent howling after laser treatment.

2. Cryotherapy with liquid nitrogen: It mainly uses the low temperature of liquid nitrogen to make the skin tissue in the birthmark necrotic and produce new tissue for treatment. This therapy is also widely used, but it is easy to leave scars.

3. Others: If the color is light and the range is small, you can try chemical peeling and peeling, and some patients will have better results.