If someone has testicular torsion and since it need to get taken care of immediately, wouldnt the person know?

Tolerance to pain: Testicular torsion is the twisting of the spermatic cord, which cuts off the blood supply to the testicle and surrounding structures within the scrotum.Pain is associated with torsion. The pain uusally sudden onset and would cause most pieople to seek emergency help. It sometimes has to be differentiated from epididymo-orchitis, an inflammation of testicle and epididymis.Depends on pain tolerance.

Yes , possible: Possible to miss crucial period , to save the testis by untwisting it . May start is discomfort and pain, swelling , involved side will be slightly higher , and can not feel the spermatic cord ( that holds testis ) immediately has to go to er for emergency surgery.

None....: Very rarely and unlikely a male affected by testicular torsion will know he gets it. But professional alert to analyze hx detailing the features of onset, degree, duration, and interval of testicular pain is the surest way to make an accurate DX of testicular torsion, after supplementing clinical suspicion with ua, physicals, and us as needed.