Symptoms of testicular inflammation include swollen and painful testicles, sexual dysfunction, and infertility. 1. Testicular swelling and pain: (1) If the testicular inflammation is caused by acute epididymitis, the enlarged testicular pain is often characterized by redness, swelling, heat and pain in the unilateral scrotal area, at this time, the pain is more intense, and the pain may even radiate to the inguinal area or lower abdomen on the same side, and there is often a history of epididymitis enlargement. (2) If it is caused by viral infection, the enlarged testicle pain is often characterized by redness, swelling, heat and pain in the unilateral scrotum or testicle area. Viral infection is often seen in acute mumps orchitis, mostly secondary to mumps, in addition to bilateral testicular enlargement and pain, there is also a high fever. 2. Sexual dysfunction: testicular inflammation may cause a decline in male sexual function, with low libido, decreased erectile function and shortened ejaculation time as the main clinical manifestations, which can be alleviated by treating the primary disease. 3. Infertility: acute testicular inflammation can lead to chronic testicular inflammation if it is not cured, and if it is bilateral chronic testicular inflammation, it may lead to dead sperm and bad sperm, which will lead to infertility.