Baby thigh root red rash is considered eczema, can use glycerine lotion, urea cream and other treatments, may also be the manifestation of ringworm, can apply terbinafine hydrochloride cream and other treatments. 1. Eczema: if there is no blisters, oozing or vesicles, you can use glycerine lotion coated with itch, if there is oozing, you need to use boric acid solution wet compresses, you can also use zinc oxide oil, boric acid components of the allergy to patients prohibited. 2. ringworm: children can use terbinafine hydrochloride cream or miconazole nitrate ointment coated, if the symptoms are serious, you can take oral fluconazole treatment, these drugs have a headache, hepatotoxicity and other side effects, allergic to any kind of pyrrole drugs, fluconazole is prohibited. If the child has severe symptoms of red rash at the base of the thigh, or if the symptoms persist for several days without improvement, the child should go to the hospital in time for treatment. The above medications must be used under the guidance of a doctor, do not self-medicate to avoid adverse reactions.