A ring of small red dots in the coronal groove of the glans is associated with a long foreskin and circumcision. If there is no pain or itching in a circle of small red dots in the coronal groove of the glans, the most common is pearl rash. Because the foreskin wraps around the glans, so near the coronal groove, can not be ventilated, dry, easy to moisture, resulting in local sebaceous gland ectopic, the formation of the glans coronal groove around a circle of small red dots. These small red dots are not painful and itchy, do not need to be treated, normally appear in rows. In addition, it may be a symptom of glans phimosis, when glans phimosis occurs, the patient will have small red dots of itching and pain. Need to try to upturn the foreskin after each urination, reveal the glans coronal groove, rinse with water, try to ventilate and dry. Otherwise, the foreskin glans is not easy to cure, and only the foreskin can be removed.