Small bumps on the foreskin only red, itchy can be considered sebaceous gland ectasia, the foreskin glans and early warts and other conditions, it is recommended to go to the hospital for further examination. 1. Sebaceous ectasia: Due to the widespread distribution of hair follicles, sweat glands and sebaceous glands in the penile prepuce, if the sex hormone secretion is exuberant during puberty and so on, it may lead to sebaceous ectasia on the prepuce, which will result in the appearance of pimples. 2. Foreskin glans: If there is a long prepuce or prepuce, usually do not pay attention to personal hygiene, may lead to the accumulation of foreskin scale, long-term stimulation caused by the foreskin glans, red bumps. 3. Sexually transmitted diseases: If there is a history of unclean sex, it is not excluded that the infection of warts and other sexually transmitted diseases, the early stage of the performance of painless bumps will also appear. Therefore, small bumps on the foreskin only red and itchy, it is recommended to go to the hospital in a timely manner under the guidance of the doctor for further examination to clarify the cause of the disease.