It is not useful for circumcised patients to use a retractable ring, and the use of a retractable ring by circumcised patients can only temporarily prevent the upturned foreskin from being reset, and does not have a permanent therapeutic effect. The ring is a ring-shaped object, the material is generally rubber, the use of the foreskin will be upturned, and then worn in the position of the glans coronal groove, can prevent the foreskin reset. Clinically, it is generally used for patients with phimosis. The use of the ring can temporarily relieve the symptoms and prevent the foreskin and glans from adhering to the glans, as it is easy to cause phimosis. It should be noted that the role of the ring is temporary, when the ring is removed, the excessively long foreskin will still return to cover the glans, and the ring can not be worn for a long time, or cause local allergic reactions, or may affect the blood circulation of the penis, causing sexual dysfunction. And the foreskin of patients with prepuce can not be upturned, it is impossible to use the retractable ring. Therefore, when there is a prepuce or circumcision, or should be surgical treatment, damage is not big and good results, recovery is also faster. Patients must choose regular hospitals to avoid adverse consequences.