Determination of pediatric testicular torsion mainly through the following aspects: 1, typical symptoms, often for the resting state, or sleep at night suddenly occurred in the scrotum, testicular area pain, the pain is more intense, some can be manifested as radioactive lower abdominal pain, often confused with acute appendicitis; 2, local signs, there can be a significant swelling of the scrotum, accompanied by obvious tenderness, lifting the scrotum pain may improve; 3, the most important means of determining the testicular torsion is the scrotal ultrasound, which can clarify the blood flow signals of the testicles. The most important means of determining testicular torsion is still scrotal ultrasound, which can clarify the blood flow signals in the testicles. There are also some patients with testicular torsion, clinical manifestations and ultrasound examination is often not typical, then may need to carry out scrotal exploration surgery to clarify the diagnosis.