The results of laser treatment for red blood cells are more pronounced, but there may be rebound, which is related to a variety of factors. For example, patients with weak skin, sensitive skin, or improper diet or cross-stimulation of skin care products may lead to the reappearance of red blood cells. Erythroderma mostly occurs on the face, due to the thin facial skin, which is susceptible to external light or chemical factors, resulting in the destruction of the skin barrier and the occurrence of superficial facial capillary dilation. For this type of capillary dilation, a non-invasive laser can be used for treatment. The principle of the treatment is to use laser energy to act on the site of redness, causing the blood vessels in the skin to coagulate and stimulating the regeneration of subcutaneous collagen, increasing the thickness and tightness of the skin, thus achieving the effect of removing redness. However, it is not possible to get rid of it all at once, sometimes it takes 2-3 times to achieve better results. The size or pulse width of the energy used to remove red blood cells is determined by the thickness of the red blood cells and the patient’s skin type. It is advisable to go to a regular hospital for laser surgery and pay attention to a light diet after surgery, avoiding spicy and stimulating foods and paying attention to sun protection so as not to affect the surgical results.