Swollen testicles in children should be taken seriously. Because many teenagers have suddenly enlarged testicles, they must be alert to sudden testicular torsion. It is recommended that you must go to the hospital for an ultrasound examination, which can detect testicular enlargement and blood flow to the testicle. If the blood flow becomes slow and the arterial blood flow to the testis is low, this condition may be testicular torsion, and surgical exploration should be performed immediately to reposition the twisted testis. If bleeding is prolonged after testicular torsion, an orchiectomy may be necessary. In addition, the blood supply of the testicle is very rich after the testicle is enlarged, and the tenderness is very obvious, this situation is acute orchitis, and anti-inflammatory treatment should be carried out at an early stage. Anti-inflammatory treatment choose the third generation of cephalosporin, treatment 5-7 days can quickly achieve cure.