Itching of the outer skin of the penis may be related to the local environment, glansitis, penile eczema and other reasons. 1. Local environment: it may be that patients usually do not pay attention to penile hygiene, resulting in the folds of the skin to hide more bacteria and other substances, which will stimulate the local skin to produce itching symptoms. 2. Glans inflammation: it may be caused by long foreskin or not paying attention to foreskin hygiene, and the glans is infected by bacteria, such as Candida and so on. This leads to inflammation of the glans, which manifests itself as itching and may spread to the entire penis. 3. Penile eczema: It may be that the underwear is not breathable, leading to the perineum is more humid, causing eczema in the penile area, which in turn leads to penile skin itching. Penile skin itching can also be seen in other causes, it is recommended that patients go to the regular hospital in a timely manner, follow the doctor’s instructions for relevant examinations, with the help of the doctor to clarify the cause, and targeted treatment or treatment, and strive for early recovery.