The number of operations using laser to remove red blood is affected by more factors, usually a course of treatment is 4-6 times, the interval between each 2 treatments is 4-6 weeks, some patients achieve good results in about 3 times, and some patients need to do about 6 times. Laser removal of red blood is through the principle of light coagulation, causing the closure of blood vessels, and at the same time can stimulate the skin collagen fiber regeneration, elastic fiber restructuring, hemoglobin quickly absorb energy, capillary wall thickening and contraction, so as to achieve the efficacy of removing red blood. The treatment effect varies according to individual situation, doctor’s technique and equipment parameters, so it is recommended to carry out treatment according to your own situation. After laser treatment, there may be a slight burning sensation and a slight reddening of the skin at the treatment site, which is a normal reaction. You can use saline local cold compresses to eliminate or relieve the redness and heat. After laser removal of red blood, pay attention to keep the treatment area clean, do not get wet or rub, rub, to avoid causing infection. It is advisable to let the scab fall off on its own and not to pick it up with your hands, otherwise it will easily cause pigmentation. After the scabs fall off, there may be transient pigmentation in the area, so you should pay attention to sun protection and not to be exposed to the sun for a long time.