Coronary white granular is a common symptom, if it does not hurt, itchy and no other uncomfortable symptoms, first of all, consider that it may be the penis pearl rash, is a normal physiological variation, does not have any effect on health, and is not contagious, so there is no need for treatment, some men can subside on their own, and some men will often appear this phenomenon. Secondly, if there are symptoms of itching or pain, consider that it may be caused by the foreskin glans, due to the foreskin is too long, the foreskin scale is not cleaned in time or not pay attention to daily hygiene. Then, also consider whether it is genital herpes, which starts as a small pimple, and then may appear as a blister, and eventually break out and erode. Finally, if there is unclean sex there is also the possibility of warts, white granules with discomfort, it is recommended to go to the hospital for examination.