Lower back with testicular pain is usually associated with acute epididymitis, testicular torsion and varicocele. 1. Acute epididymitis: because the testicles exist in the epididymis, when epididymitis has an acute attack, the blood vessels and nerves localized in the epididymis are stimulated by inflammatory factors will produce pain, which can involve the testicles also. When the pain is more intense, there will be radiating pain, which can radiate to the waist. 2. Testicular torsion: If the testicle is twisted clockwise or counterclockwise along the spermatic cord, resulting in localized ischemia of the testicle, the testicle will experience severe pain, which can radiate to the lower back. 3. Varicose vein of spermatic cord: If the spermatic cord is abnormally dilated and tortuous due to increased venous pressure and other reasons, i.e. varicose vein of spermatic cord, when the condition is serious, the testicle on the affected side will be swollen and enlarged, accompanied by pain. Because the spermatic cord passes through the inguinal canal with the iliohypogastric and ilioinguinal nerves passing above and below it, the varicose spermatic cord may compress the peripheral nerves and cause back pain. The above symptoms may also be caused by other factors, and patients are advised to go to regular hospitals in time to find out the cause of the disease and under the guidance of professional doctors for treatment, in order to strive for early recovery.