A few mung bean-sized nodules in the foreskin can be caused by diseases such as pearly papules and condyloma acuminatum. 1. pearly pimples: penis and foreskin in the pearly pimples, often distributed in the foreskin near the tie, can also be distributed in the glans around the coronal groove, can be manifested as a granulomatous and papillomatous protuberance, similar to the size of mung bean nodules, usually not accompanied by pain and other uncomfortable symptoms. 2. Acute warts: Acute warts can occur in the foreskin, glans, urethra, perianal, perineal area and other parts of the main manifestation of the cauliflower-like or papillary protrusions, the surface is not smooth, the volume of the development of the disease with the gradual increase in size, but also can be accompanied by pain and bleeding and so on the performance of, can be similar to the growth of a mung bean-sized nodule. When the foreskin grows a few nodules the size of green beans, you should consult a doctor in time, under the guidance of a specialist doctor active treatment, will help to alleviate the discomfort of the symptoms early.