What is the primary symptom of testicular torsion?

The primary symptom of testicular torsion is indeed sudden pain in the testicle. Testicular torsion is a medical emergency that occurs when the spermatic cord becomes twisted, cutting off the blood supply to the testis. This condition often presents abruptly, and the pain is typically severe, affecting the affected testicle. The onset of pain may be accompanied by nausea and vomiting due to the acute nature of the situation.

Understanding this symptom is crucial, as testicular torsion can lead to the loss of the testicle if not treated promptly. Recognizing sudden testicular pain allows for immediate medical evaluation and intervention, which is critical in preserving testicular function and preventing complications. The other symptoms listed do not directly relate to testicular torsion, which further emphasizes the specific and urgent nature of the pain associated with this condition.