Hard lump at the root of epididymis can be caused by chronic epididymitis, epididymal tuberculosis, epididymal cyst and other factors. 1. Chronic epididymitis: chronic epididymitis can occur after the acute phase of inflammation, and the local fibrous scar tissue is mainly repaired, which can lead to scarring hard lumps at the root of the epididymis, which is usually not accompanied by pain and swelling and other discomforts. 2. Epididymal tuberculosis: after the occurrence of epididymal tuberculosis, hard lumps may appear in the vas deferens and epididymis, which may be accompanied by night sweating (abnormal sweating after going to sleep, and the sweating stops after waking up) and low fever in the afternoon, which is often accompanied by a history of tuberculosis of the lungs or the urinary system. 3. Epididymal cyst: Epididymal cyst can be triggered due to semen retention, etc. A hard lump can be touched locally, which is not accompanied by obvious pain and other uncomfortable symptoms. Men with hard lumps at the root of the epididymis should consult a doctor in time. Active treatment under the guidance of a specialist will help relieve the uncomfortable symptoms as soon as possible.