When a child develops a rash with red dots all over the body, it is necessary to combine the possible accompanying symptoms to determine the general cause and treat it as appropriate. If the rash is characterized by scratching, itching, rubbing and other itchy manifestations, it is usually related to allergic factors, and the first step in treatment should be to consider the allergens that may have been exposed to, and try to avoid them as much as possible. When the itchy rash is obvious, you can use topical glycerine lotion or zinc oxide ointment, etc., or oral antihistamines, such as cetirizine, loratadine, etc.. If the rash with obvious itching lasts for a longer period of time, hormonal topical medications, such as Euthyrox, Eloxon, etc., may be needed, and it is recommended that these medications be used under the guidance of a professional dermatologist. If there are signs of a recent viral infection such as fever, the rash is usually considered a viral rash. Viral rashes do not require special treatment and can improve to disappear on their own in the course of the original disease. If the rash is a bleeding spot that does not fade when pressed, it is important to be on the lookout for purpura or other hematologic disorders, which do not need to be treated separately, but require early diagnosis and treatment of the primary disease.