The actual itchy red bumps at the root of the thighs are considered the following: 1, papular urticaria, is due to too much bare skin in the summer, mosquito bites lead to allergic reactions, clinical treatment, you can apply hydrocortisone butyrate ointment, propionic acid ointment, mixed with black bean distillation oil, zinc oxide boric acid ointment treatment, oral medication can choose oral solution of levocetirizine hydrochloride, or lupatadine fumarate for treatment. 2, common warts or condyloma acuminata, after scratching caused by bacterial infection, in addition to itching, can also see the rash around the redness and swelling, clinical treatment need to apply fusidic acid ointment, anti-inflammatory treatment at the same time, topical recombinant human interferon alpha-2b ointment antiviral treatment.