There are several possibilities to consider when red blood lines appear on the legs. If a red blood-like texture appears on the thigh area, the possibility of swelling lines, also known as atrophy lines, should be considered. The cause is mainly due to the rapid growth of height and weight gain leading to excessive stretching of the local fibrous tissue. It is recommended to pay attention to weight loss without treatment, and those who feel that it affects the aesthetics can apply topical mucopolysaccharide polysulfate cream, etc. If necessary, laser treatment, radiofrequency treatment and mesotherapy can be chosen. If the local is only simple capillary dilation, which is clinically referred to as capillary dilation. The pathogenic factors may be related to long-term prolonged standing or the external use of glucocorticoid drugs, etc. It is recommended that topical vitamin E cream and oral vitamin C be used locally, and intense pulsed light treatment can be chosen if necessary.