Shining in the foreskin can be caused by glans circumcision, fixed drug rash, angioedema and other factors. 1. glans and foreskin inflammation: after the occurrence of glans and foreskin inflammation, may appear in the local redness, swelling, congestion and other manifestations, trauma can be due to lesions and shiny, or the emergence of vesiculation, accompanied by purulent secretion outflow. 2. Fixed drug rash: after the occurrence of drug rash reaction within the foreskin can appear in the local round or oval including, the center can be purple swelling, local accompanied by burning and itching sensation, the local can also be developed into blisters, appearing within the foreskin shiny performance. 3. angioedema: due to food and drug allergies or mosquito bites and other factors, can lead to acute allergic reactions within the foreskin, the foreskin can occur highly edematous and shiny performance. The brightness of the foreskin should be timely medical treatment, under the guidance of specialists to actively carry out appropriate treatment, will help early relief of the discomfort symptoms.