The fact that you have a sore back and testicles can be considered prostatitis, orchitis and urinary stones, it is recommended that you go to the hospital for further examination to clarify the cause of the disease. 1. Prostatitis: When male patients experience lumbar back pain and other lumbosacral discomfort along with testicular and scrotal discomfort, they may consider chronic prostatitis due to sedentary and other bad habits, which can cause scrotal swelling and lumbar abdominal discomfort. 2. Orchitis and epididymitis: You can also consider that testicular inflammation and epididymitis are caused by sexually transmitted or retrograde infections of the urinary system, which cause swelling of the scrotum and pain in the lower back and abdomen. 3. Urinary stones: In addition, it is not excluded that kidney stones, ureteral stones and other conditions caused by hydronephrosis and so on lead to discomfort in the lower back and scrotum. The above symptoms may also be caused by other factors, therefore, it is recommended that patients go to the regular hospital in time for further ultrasound and other tests to clarify the diagnosis, under the guidance of the doctor’s scientific treatment, and strive for early recovery.