A lot of red dots on the legs should be for the cause of the symptomatic treatment, the general use of medication, common causes include allergic dermatosis, peripheral keratosis, and so on. 1. Allergic dermatosis: allergy-prone people, when the legs come into contact with certain allergens, such as pollen, animal fur, clothing, etc. may induce allergic dermatosis, manifesting itself in red papules, blisters, etc., accompanied by intense itching symptoms on the surface of the skin. Local topical glucocorticoid cream, such as mometasone furoate cream, halometasone cream, etc., severe symptoms, can be combined with the application of oral drugs, such as loratadine tablets, benzylamine hydrochloride tablets and other antihistamines. 2. Keratosis pilaris: Keratosis pilaris may be related to vitamin A deficiency, heredity, endocrine factors, etc. It occurs on the outer side of the upper arm and the anterior side of the thighs, and manifests itself as a small reddish pimple on the surface of the skin, which is usually asymptomatic. Topical vitamin A cream and tazarotene gel can be used, and if the symptoms are severe, medium-acting glucocorticoid creams, such as mometasone furoate cream and hydrocortisone butyrate cream, can be used in conjunction with oral intake of vitamin A and vitamin E to improve the symptoms. All of the above medications should be used under the guidance of a professional doctor, avoid self-medication. A lot of red spots on the legs, there may also be other causes, it is recommended to go to the hospital in time to improve the examination, to clarify the cause of the disease to give targeted treatment.