Orchitis and testicular torsion are two conditions that can cause pain and swelling in the testicles, but they have different causes, symptoms, and treatments. Here are some of the main differences between them:

– Orchitis is an inflammation of the testicle, usually caused by a bacterial or viral infection. Testicular torsion is a twisting of the spermatic cord that supplies blood to the testicle, which can cut off the blood flow and damage the testicle.
– Orchitis can be acute or chronic, and it may affect one or both testicles. Testicular torsion usually affects only one testicle, and it is a medical emergency that requires immediate treatment.
– Orchitis may cause symptoms such as fever, nausea, fatigue, and pain during urination. Testicular torsion may cause symptoms such as sudden, severe pain, swelling, redness, and nausea.
– Orchitis is mainly treated with antibiotics, anti-inflammatory drugs, and pain relievers. Testicular torsion is treated with surgery to untwist the spermatic cord and fix the testicle to the scrotum.