The foreskin opening is too tight after erection depends on whether the glans can be exposed after erection, the glans can be exposed can choose to loosen the operation, can not be exposed to be circumcised. The tightness of the foreskin after erection generally refers to phimosis, which is the narrowing of the outer opening of the foreskin, the head of the penis can not be exposed, and need to perform circumcision. If the head of the glans can be exposed after erection, but only appears to have a tight circumcision after the opening of the foreskin is turned up, you can choose circumcision release surgery to help the expansion of the foreskin. It is recommended to seek timely medical treatment if the circumcision is too tight after erection to avoid complications such as incarceration and rupture of the foreskin. In daily life, we should pay attention to maintain the local hygiene of the penis to avoid further development of the condition and prevent the occurrence of glans phimosis, and obese people should also exercise appropriately, control their diet and reduce their weight.