Bumps on the scrotum without pain or itching may be caused by sebaceous cysts, warts, molluscum contagiosum and other reasons. 1. Sebaceous cysts: If the sebum secreted by the sebaceous glands in the scrotum area cannot be discharged normally from the follicle opening, pimples may appear without pain or itching. 2. Condyloma acuminatum: a sexually transmitted disease caused by human papillomavirus (HPV) infection with proliferative damage in the anogenital area as the main manifestation. It can also appear in the scrotum of the superfluous organisms, can also be manifested as painless and itchy pimples. 3. Soft fibroma: common in middle-aged and old age, is a benign tumor, if the scrotum area appears soft fibroma, can also be manifested as painless and itchy bumps. There are many reasons why the scrotum is so long and painless, it is recommended to go to the hospital in time to clarify the cause of the disease, and standardize the treatment under the guidance of the doctor, so as not to delay the condition.