Hard lumps in epididymis are mainly considered to be related to pathological factors such as epididymal tuberculosis, chronic epididymitis, epididymal cysts and so on. 1. Epididymal tuberculosis: if localized hard lumps appear in the site of tuberculosis lesions, besides the epididymis, the vas deferens may also become hard, accompanied by symptoms such as low-grade fever and night sweating (abnormal sweating after going to sleep, and sweating stops after waking up). 2. Chronic epididymitis: after acute inflammation, mainly focusing on the repair of fibrous scar tissue, it can cause local scar tissue, which manifests as the symptom of hard lumps in the epididymis, which can be accompanied by pain, swelling and so on. 3. Epididymal cysts: Epididymal cysts belong to semen retention cysts, which can be manifested as hard lumps in the epididymis, mostly without obvious pain. If you find hard lumps in the epididymis, you should go to the hospital in time to get a clear cause of the disease and then take active treatment to avoid delaying the condition.