If the glans is necrotic, then the common clinical manifestations: 1, glans because of ischemia occurs necrosis, will be manifested as glans hair green, purple, if completely ischemic, loss of blood supply nourishment, there can be glans black, common in the glans strangulation and lead to ischemia. If the prepuce circumcision incarcerated disease in the glans coronal region caused by ischemia, then necrosis can occur.2, the pain of the glans, pain progressive aggravation, such as complete ischemia, then there can be severe pain, accompanied by the surface of the ulceration, accompanied by the glans volume shrinkage.3, the emergence of localized breakthroughs, such as the involvement of the urethra, then it can be difficult to urinate, the emergence of the situation of inability to urinate. Suprapubic cystocentesis or transurethral catheterization is required.4. Systemic symptoms can occur, such as further necrosis of the glans, bacteria enter the bloodstream and cause sepsis, chills, high fever, accompanied by local pain.