The possible causes of testicular distress without pain are: 1. Localized testicular distress without obvious pain can occur after excessive sexual stimulation but without sexual activity or ejaculation, which can cause excessive gonadal secretion and stagnation of semen, resulting in localized distress without painful symptoms, which can be relieved after resting if you perform ejaculation or stop related sexual stimulation. 2. varicocele can cause testicular swelling without pain, especially after prolonged standing or forceful activity, and when touched by hand, the testicles can be found to be slightly enlarged or the scrotum slightly enlarged, and the thickened spermatic vascular tissue can be felt inside, which can be relieved after rest, but further ultrasound examination of the spermatic cord is needed to assess the degree of varicocele. 3, If you are suffering from urinary tract infection or viral infection, you may experience testicular distress, which may be accompanied by symptoms such as frequent urination, urgent urination, incomplete urination and pain in the abdomen.