Itching at the root of the penis may be caused by pubic lice disease, scrotal eczema and vulvar folliculitis. 1. pubic lice disease: itching at the root of the penis may be caused by pubic lice disease, pubic lice disease is a contagious parasitic disease caused by pubic lice biting the skin itching, the onset of the site is usually in the pubic hair area, around the anus, armpits and other parts of the body, manifested as intense itching, more serious in the evening. 2. Eczema: Penile root itching may be caused by eczema, the initial eczema in the scrotum can be extended to the anus, a few extended to the penis. It can be manifested as redness, swelling, erosion and oozing of the skin of the scrotum and penis, accompanied by itching. 3. Vulvar folliculitis: itching at the base of the penis may also be caused by vulvar folliculitis, which can be manifested as redness, swelling and pain around the follicular opening of the vulvar skin, accompanied by mild itching, and gradually form conical pustules. Patients with symptoms of penile root itching, should go to the hospital in a timely manner, clear cause under the guidance of the doctor active treatment.