A meatball on the right epididymis may be caused by epididymal cyst, epididymal nodule, testicular tumor and other factors. 1. Epididymal cyst: for example, trauma or chronic infection may lead to the presence of localized cysts in the epididymis, which will appear similar to a meatball-like substance, and may be accompanied by pain, swelling and other uncomfortable symptoms. 2. Epididymal nodule: it may be related to epididymitis, due to the presence of inflammation, causing local stimulation, which will lead to the appearance of localized meatball-like material, and may be accompanied by symptoms such as falling, pain and so on. 3. Testicular tumor: it may be related to heredity, poor lifestyle and other factors, which may lead to localized lumps in epididymis, similar to meatballs, which will continue to increase in size, and in serious cases, it will also metastasize to distant places. If there is a meatball on the right epididymis and other abnormal manifestations, it is recommended to consult a doctor for examination and treatment to avoid delaying the condition.