Itchy skin on the lower body of men needs to be further clarified after examination at the hospital: first, fungal infection of the skin, which can cause there to be itchy skin, which can be accompanied by thickening of the skin, skin flaking or with changes such as dermatophytosis, which requires fungal examination to confirm the diagnosis. Second, scabies, the patient is infected with scabies or mites in a dark and humid environment, which can cause significant itching, or even the formation of scabies nodules, accompanied by obvious heavy to or scratch marks, the need for relevant examination to confirm the diagnosis. Third, there is an acute allergy, which can cause itchy skin with a rash, often with bifurcation-like changes in the acute allergy period. After discontinuing or stopping contact with the allergen, the itchy symptoms can be gradually relieved. Fourth, eczema of the skin can appear with itching and a variety of changes such as redness, rash or flaking of the skin, which requires further examination to confirm the diagnosis.