A lot of small red dots on the outside of the buttocks and thighs may be due to eczema, prickly heat, folliculitis, etc., which can be treated with daily care and medication according to the cause. 1. Eczema: a chronic inflammatory itchy skin disease. When there is no decay and oozing, you can use glycerine lotion, hydrocortisone butyrate cream, etc. When there is a lot of oozing, you can use 3% boric acid solution to apply cold compresses, and when there is decay but not much oozing, you can use zinc oxide paste and other drugs for treatment. If there is rotting but not much oozing, zinc oxide paste can be used for treatment. Oral loratadine and other anti-allergic drugs can be used for treatment. 2. Prickly heat: It is a common skin disease in summer or hot and humid environment. Localized skin should be kept cool and dry, and loose and comfortable clothes should be worn. You can use topical glycerine lotion and prickly heat powder, etc. If the itching is more serious, you can take oral loratadine tablets and cetirizine hydrochloride tablets. 3. Folliculitis: manifested as red papules centered on hair follicles. It is mostly related to infection. It is important to improve the living habits and keep the local skin clean. Bacterial infections can be treated by applying fusidic acid ointment and oral cefuroxime capsules; fungal infections can be treated by topical ketoconazole cream and oral itraconazole capsules. It is recommended to go to the hospital in time for examination and diagnosis, to identify the cause of the disease, under the guidance of professional physicians to use drugs and targeted treatment.