A lot of red flaky spots playing on the legs are commonly associated with eczema and contact dermatitis. In addition, there may be purpura and psoriasis. It is recommended that patients seek medical attention and take appropriate measures to avoid further progress. 1, eczema: especially chronic eczema, will appear on the legs or the whole body red flaky spots, serious cases can be fused into a sheet, can be treated with antihistamines, vitamin C drugs, and then with topical glucocorticoid drugs; 2, contact dermatitis: contact dermatitis will appear on the facial skin, legs skin flaky Erythema, which is an inflammatory reaction caused by skin contact with exogenous substances, usually requires treatment with antihistamines or glucocorticoids; 3, purpura: due to lesions in the blood vessels themselves, damage to the vessel walls or osmotic red blood cell exudation, easily appearing as red flaky spots on the legs, which may be related to the patient’s own liver disease or coagulation disorders. If it is thrombocytopenic purpura, glucocorticoid treatment is needed. If it is allergic purpura, it can be treated with chlorpheniramine maleate tablets, vitamin C, etc.; 4. psoriasis: the patient’s leg skin can appear red flaky spots covered with silvery-white scales, which can be treated with retinoic acid drugs as well as glucocorticoids, and also UVB phototherapy as well as laser treatment, etc.