Penile itching but no surface symptoms, may be abnormal nerve regulation, allergic factors, infection factors and other reasons. 1. Abnormal nerve regulation: for example, local peripheral nerve regulation is abnormal, or diabetes-induced neuropathy, may lead to penile itching but no surface symptoms. 2. Allergic factors: for example, local skin allergic dermatitis, rashes and other factors, the symptoms are not typical, can also lead to penile itching, but there is no surface symptoms of the situation. 3. Infection factors: such as glans, urethritis or fungal skin infections, etc., when the symptoms are not typical, can also lead to penile itching but no surface symptoms. Penis itchy but no surface symptoms, may also be caused by other reasons, need to go to the regular hospital in time to check, clear the cause of the disease, follow the doctor’s instructions, and strive for a speedy recovery.