Men with itchy thigh roots need to be treated according to the cause. Itchy thigh roots caused by many reasons, generally considered ringworm, eczema, allergies, scabies and other causes, mainly using drug treatment. 1. Ringworm: due to direct contact or indirect contact and infection, due to fungal infection, manifested as ring or half-ring ring-shaped erythema, the surrounding skin border is clear. Miconazole nitrate cream or terbinafine hydrochloride cream can be used externally, with oral itraconazole to treat. 2. Eczema: due to allergies and physical and chemical factors, mainly manifested as erythema, papules, papules, blisters, oozing and other symptoms. It can be treated with topical dexamethasone acetate ointment, together with oral loratadine and other anti-allergy drugs. 3. Allergy: such as skin care products, food, drugs and other allergic reactions, manifested in local red bumps with itching and other symptoms. Under the guidance of the doctor, oral levocetirizine tablets, topical glycerite lotion. 4. Scabies: due to scabies mite parasite infection, skin damage manifested as pinhead-sized papules, papules and blisters, often scattered, symmetrical distribution, the emergence of scabies mite tunnels, scabies nodules and so on. It can be treated externally with 1% γ-666 emulsion or ointment, 10% sulfur ointment and so on. In addition to the above causes there are many kinds of diseases can lead to, need to go to the hospital, clear cause for treatment, the above drugs need to be used under the guidance of a doctor, do not self-medication.