The foreskin can’t be turned up after hardening, which is usually caused by small skin opening and long foreskin. 1. Small skin opening: patients with small skin opening will lead to hard after the inability to turn up, forcibly turned up will lead to local ischemic necrosis, glans phimosis, etc., the patient can adhere to the daily life of the foreskin gently turned up several times a day, but also to go to the hospital for circumcision, should pay attention to the post-surgical care, to prevent the occurrence of infection. 2. circumcision: the patient hard after the foreskin can not turn up may be caused by the circumcision, the patient can be circumcised by way of circumcision surgery to treat the circumcision, the patient should pay attention to the hygiene and cleanliness after the operation, and actively prevent infection. After hardening, the foreskin can not be turned up usually may also be caused by foreskin infection, developmental abnormalities, etc. It is recommended that the patient go to the hospital for examination and choose the appropriate treatment program.