The inability to separate the foreskin from the glans may be due to the presence of phimosis, phimosis, phimosis or adhesion of the foreskin to the glans caused by trauma. 1. Phimosis: Phimosis refers to the narrow opening of the foreskin or the partial adhesion between the inner plate of the foreskin and the glans, which makes it difficult to turn up the foreskin and the glans cannot be exposed. According to the causes, it can be divided into physiological and pathologic phimosis. (1) Physiological phimosis: it is a disease of human body in the process of growth and development. (2) Pathological phimosis: generally due to local trauma, infection, inflammation and other factors leading to scarring contracture, narrowing of the opening of the foreskin, usually can not be self-healing, the need for surgical treatment. 2. Hypospadias: refers to the penis in the state of weakness glans can not be exposed or only partially exposed, if you do not pay attention to hygiene, it is easy to reflect the foreskin glansitis. 3. Inflammation or trauma: If the inner plate of the foreskin or the glans is inflamed or traumatized, the healing process may lead to adhesion between the foreskin and the glans, making it impossible to separate them. Found the existence of the foreskin or phimosis, do not worry too much, need to go to the hospital in a timely manner, usually through surgery can get good treatment. Usually pay attention to keep the foreskin, glans and vulva clean and hygienic, avoid inflammation and trauma.