Facial capillary dilation is commonly known as “red blood”, the diameter of its blood vessels is less than 0.5mm, mostly linear, dendritic, spider-like, stellate, dotted distribution, mostly seen in middle-aged and young women around the cheeks and nose, is one of the important manifestations of skin photoaging and facial rosacea, clinically seen in the plateau, cold, strong ultraviolet areas. It can also be caused by repeated allergy to skin cosmetics or long-term topical use of hormonal drugs. Extensive facial capillary dilation often has diffuse and continuous facial flushing and burning, and is usually sensitive to cold, heat and sunlight. Therefore, capillary dilation not only affects the aesthetics, but also often causes discomfort to the patient. Medical lasers are the treatment of choice. Pulsed fuel lasers have been the gold standard for the treatment of vascular diseases since 1990. However, purpura is the most common side effect, usually lasting about 14 days, and for the treatment of diffuse facial lesions, postoperative purpura for 2 weeks or longer, which has a significant impact on the patient’s school and work. Pigmentation is also quite common in clinical treatment. The advent of intense pulsed light has made the treatment of facial capillary dilation safer, especially for patients with large dilation. General intense pulsed light (wavelength 500-1200nm) can remove erythema, congestion, and dilated blood vessels, and improve pigment unevenness and skin texture in the treatment of large capillary dilation. Postoperative reactions are light, there is no postoperative downtime, no special care is required, and the risks of long treatment courses and scarring from traditional treatment methods are reduced, making it easily acceptable to patients. However, ordinary intense pulsed light has a wide range of wavelengths, and a large part of the energy cannot be absorbed by hemoglobin, so the clinical efficacy needs to be further improved. The new intense pulsed light changes this status quo, with a wavelength of 500-600nm, which is more targeted at the absorption peak of oxygenated hemoglobin, reducing the damage to the skin while retaining the effective treatment wavelength, producing photothermal effects on the hemoglobin in the blood vessels with as little damage to normal tissues as possible, causing denaturation and coagulation, while damaging the endothelial cells of blood vessels, eventually leading to the degeneration of vascular occlusion and closure of dilated of blood vessels to achieve the purpose of treatment.