The circumcision ring can prevent the foreskin of patients with phimosis from being turned over to the proximal end of the coronal sulcus and then return to its original state of wrapping the glans, so that the head of the penis can be fully exposed. The way to use the circumcision ring is to clean the penis and glans and then open the foreskin to fully expose the glans, and then put the circumcision ring on the coronal groove, which can generally prevent the recovery of the overgrown foreskin. It is important to note that there are different models and sizes of circumcision rings, and patients should choose the most appropriate size according to the circumference of the coronal sulcus, so as not to wear it securely or too tightly. The use of a circumcision ring can lead to poor blood flow to the penis, which may result in low libido, difficulty in erection, and in a few cases, improper use of the ring may also lead to penile ischemia and necrosis, so it is not recommended to wear the ring for a long period of time. Moreover, the ring is usually made of rubber, and it is forbidden for those who are allergic to rubber. Circumcision blocking ring is only a temporary relief of circumcision, and can not be a complete treatment, if the patient has repeated circumcision glans, or to the hospital as soon as possible for surgical treatment.