There are small bumps at the base of the thighs that are itchy. First, first of all, you need to test for fungus, and if the test is positive, consider the possibility of ringworm more likely. You can use topical naftifine ketoconazole cream, or luliconazole ointment, and take oral terbinafine hydrochloride tablets once a day, two tablets at a time. Second, it may be folliculitis, mainly caused by bacterial infection, you can apply clindamycin phosphate gel, or fusidic acid ointment treatment. If the inflammation is more serious, you can also take oral minocycline hydrochloride capsules 50mg, twice a day for treatment. Third, eczema, mainly caused by allergies, in the treatment can be applied levocetirizine hydrochloride capsule, take one capsule every night, topical application of mometasone furoate ointment, once a day at night, and combined with flufenamic acid butyl ointment morning and evening application. During the treatment period, alcohol and spicy and irritating food should be avoided.