If there is a hard lump on the testicle for a longer period of time, it is also necessary to go to the hospital for relevant examinations to clarify the cause: First, if there has been testicular inflammation, there may be localized fibroproliferative nodules after the inflammation has healed, manifesting as hard nodules, painless and non-itchy, and without any conscious symptoms, and ultrasound examination is needed to further confirm the diagnosis. Secondly, epididymal nodules, often seen after secondary epididymitis or epididymal tuberculosis, can show local hard nodules with close adhesion to the testicles, sometimes it is not easy to distinguish, and ultrasound examination of the scrotum is needed to further confirm the diagnosis. Thirdly, trauma to the testicles can also appear as nodules with local scar growth after trauma healing. Usually there is a clear history of trauma, and if a local hard nodule appears after trauma, it is related to the scar formed by trauma and does not need any special treatment. Fourthly, tumor of the testis, but the mass may gradually increase in size or change to diffuse enlargement over time. Testicular tumor indexology tests, as well as CT examination of the testes are needed to perform the necessary exclusion.