There are many reasons why men have small bumps at the root of the penis, such as infectious molluscum contagiosum, condyloma acuminatum, flat warts and so on. 1. Molluscum contagiosum: Molluscum contagiosum is mainly caused by the infection of the molluscum contagiosum virus, usually no obvious self-conscious symptoms, can show the size of rice grains of waxy glossy feeling spherical, hemispherical pimples, which can cause small bumps on the root of the penis of men. 2. Warts: Infection with human papilloma virus can cause warts, belonging to the sexually transmitted diseases, can show papillary, cauliflower, crown-shaped and other forms, resulting in the male penis root pimples phenomenon. 3. flat warts: flat warts belong to the second stage of syphilis, can occur in the penis location, the surface flat, vesicles, resulting in men with small bumps at the root of the penis phenomenon. The reason for this is that there are many reasons why men have small bumps at the base of the penis, and it is recommended that they go to the hospital in time to complete the examination and take standardized treatment according to the doctor’s instructions, so that they can not ignore the symptoms, and take it lightly.