There is a hard nodule on the left side of the epididymis, which may be an epididymal nodule. It is often seen secondary to epididymitis or epididymal tuberculosis, because when inflammation or non-specific infection occurs, fibroblasts proliferate during the healing process and nodule-like changes may occur. It may be painful in the acute stage and asymptomatic in the chronic stage, and may persist for a long time. The boundary with the testicle is not clear, there is no pain when touched, and it simply shows a tougher texture. It is recommended to go to the hospital for ultrasound examination. For patients who have had testicular and epididymal infections, the majority of nodules that can be felt after healing are nodules of the epididymis. Generally, no medication or other forms of treatment are needed, but for patients with recurrent infections, surgical removal is recommended if there are epididymal nodules. However, for unmarried men, any surgical treatment of the epididymis is prohibited.