Two white bumps on the outside of the penis, no pain, no itch, may be related to sweat duct tumor, pearly penile papules, warts and so on. 1. Sweat duct tumor: a kind of adenoma of the ducts of small sweat glands in the epidermis, which is a benign swelling, may appear yellowish round, ovoid or irregular shape, usually without local itching, pain, no secretion. 2. Pearly penile papules: may be physiological developmental variations, may also be related to local irritants, infections, etc.. Pearly penile papules are pearly, translucent papules of dermatosis, manifested as translucent or white small papules, similar to white bumps, usually painless and itchy. 3. Warts: due to human papilloma virus infection, caused by the proliferation of skin and mucous membranes, early can be manifested as white pimples, can be a single appearance, can also be more than one and accompanied by each other fusion, early generally no itching, pain symptoms. When there are two white bumps on the outside of the penis that do not hurt or itch, it is recommended to consult a doctor for further examination as prescribed by the doctor, to clarify the cause with the help of the doctor, and to carry out targeted treatment or therapy.