Ultrasound first. First you have to diagnose the cause of orchitis. I would first order a trsticular ultrasound. If caused by hyrocoele or varicocoele, then can be surgically removed. If it is caused by testicular cancer, that would require removing the testes and radiation with sometimes estrogen hormone treatment. If ultrasound negative, it could be inhumanly hernia requiring surgery. Other cause is groin strain.