Large testes are possibly a sign of an underlying health condition, according to Healthline. Some related conditions associated with large testes, such as torsion of the testes, require urgent care.
Large testes, or scrotal swelling, may be a sign of an inguinal hernia, a condition during which intestinal or fatty tissue pushes through a region within the groin near the testes. Inflammation of the testicles, or orchitis, is another possible condition, as is epididymitis, an inflammation of the tube at the back of the testicles that carries sperm. Testicular cancer or abnormalities of the veins and arteries that deliver blood to the scrotum can cause swelling of the testes, as well, states Healthline.