Erythroderma, also known as capillary dilation, is still relatively common around the nose in clinical practice. It arises from two main causes: the first is rosacea, and many patients with rosacea will not only have red blood on the nose, but also around the nose. The second is recurrent seborrheic dermatitis in the nasolabial folds area. Whether it is rosacea or seborrheic dermatitis, these red inflammatory stimuli will gradually lead to the appearance of localized red blood. On the one hand to treat the primary disease, on the other hand for red blood we can use pulsed dye laser to act directly to the red blood inside the oxygenated hemoglobin, to achieve the purpose of removing red blood, the effect is very good. It is often possible to achieve more desirable results without breaking the skin or leaving scars.