If men experience pain in the abdomen and testicles, they need to go to the hospital for further examination to clarify the possible causes.1. Acute orchitis or epididymitis, which will result in an increase in the size of the testicles or epididymis. Sometimes the inflammation is more obvious, the boundary of the testis and epididymis is not clear, manifested as diffuse enlargement, and the spermatic cord can be involved in serious cases, thus producing pain in the abdomen. It is obvious when moving, need to rest in bed, and carry out testicular and epididymal ultrasound, anti-infection treatment.2, testicular torsion, which belongs to a kind of urological emergencies. When the testicle rotates clockwise or counterclockwise along the spermatic cord, there will be ischemia of the testicle and epididymis, which will cause acute pain. The pain may radiate to the lower abdomen and worsen with time as the ischemia worsens. An ultrasound examination of the testicles and spermatic cord should be performed immediately. If testicular torsion is confirmed, immediate surgical restoration is needed.