The possible causes of many small red dots on the glans: First, due to non-infectious factors, such as long foreskin, prepuce resulting in more local foreskin scale, long-term chronic stimulation will appear reactive small red dots, or the presence of more dirt, long-term inattention to personal hygiene can also appear many small red dots, can be accompanied by itching, but also without any conscious symptoms. The need to maintain local personal hygiene, or circumcision treatment. Second, the infectious factors. Such as bacterial infection, trichomonas infection or fungal infection, can appear glans small red dots, accompanied by local swelling, pain. The range of small red spots can gradually expand to form glans erythema, or accompanied by erythema on small papules, small herpes and other changes. It is necessary to carry out the relevant pathogenic tests and give symptomatic medication after the diagnosis. Third, sexually transmitted diseases, such as mycoplasma, chlamydia or syphilis and other infections can cause a lot of small red spots on the glans. This situation occurs before there is a history of unclean sexual contact, need to carry out the relevant transmission disease examination, to further confirm the diagnosis.