Erythema nevosum, also known as wine nevus, is a capillary malformation that occurs on the face and neck as a pink to purplish-red spot. In some patients, the lesions may develop gradually with age, deepen in color, thicken and even form nodules, which seriously affects the physical and psychological health of patients. So far, the exact cause of nevus is still unclear and may be related to neurological, vascular, cytokine, genetic and other factors. Traditional treatment methods include sclerotherapy injection, surgical excision, freezing and radiotherapy, etc. These methods have limited efficacy and are prone to complications such as scarring and pigmentation changes. With the development of laser medicine, a variety of laser devices have become the main modality of its treatment. In recent years, the emerging photodynamic therapy has become the most ideal method for treating vivid nevus with its exact treatment effect, great safety, short avoidance period, low treatment reaction, large area can be treated at one time, and no recurrence.