Little boy penis itchy red may be the existence of circumcision glans, may also be localized allergic reaction. 1. circumcision: boys have a long foreskin or circumcision, do not pay attention to the lower body hygiene, may be induced by circumcision, such as fungal or bacterial circumcision, will lead to penis itching, redness, accompanied by swelling, pain and other symptoms. 2. Allergic reaction: the use of irritating toiletries in the bath, or wearing poor quality underwear, may cause an allergic reaction to the penis, which can lead to redness and itching of the penis, and accompanied by obvious tingling. In addition, there are other causes of itchy red penis in young boys, parents are advised to take their children to the doctor for examination and treatment to avoid other complications caused by untimely treatment.