It is not recommended to widen the opening of the foreskin by hand, as it may cause damage to the foreskin and bacterial infection. The foreskin of the penis is a double layer of free circular wrinkles formed by the skin in front of the neck of the penis, encircling the head of the penis. If the head of the penis is wrapped up and cannot be exposed in its natural state, this condition is called phimosis. In severe cases, phimosis occurs, which can lead to manifestations such as foreskin scaling and difficulty in urination, seriously affecting the quality of life. Enlarging the opening of the foreskin by hand does not fundamentally improve the narrowing of the head, and if accompanied by foreskin injury and bacterial infection, diseases such as priapism and urethritis can occur. Therefore, regular surgical treatment is usually required to relieve the manifestation of phimosis or circumcision. In short, it is not desirable to widen the opening of the foreskin by hand. In case of phimosis or phimosis, you should go to a regular hospital for consultation and treatment under the guidance of a doctor.