A small proportion of perianal eczema will spread to the scrotum, and most perianal eczema has a favorable prognosis as long as it is treated in a timely manner. The etiology and pathogenesis of perianal eczema are still unclear, and it is generally believed to be related to self-factors, such as chronic infection lesions, metabolic disorders, and personal allergies, etc. Perianal eczema is actually a non-infectious skin disease confined to the anus and manifests itself as itchy, erythematous or maculopapular rashes, blisters, vesicles, and oozing of the skin in the perianal area. Although perianal eczema is more common around the anus, a small percentage of perianal eczema can involve the scrotum, resulting in rashes and itching in the scrotum. If treated in a timely manner, perianal eczema usually has a good prognosis and does not involve other localized skin. However, it is easy to recur and difficult to recover. Consult your physician for advice.