The symptoms of epididymo-orchitis (EO) are usually mild, but serious complications such as abscess and testicular necrosis can occur. There are a few cases of testicular necrosis secondary to EO to our knowledge. We present a case of a 60-year-old diabetic male patient who presented with left scrotal pain and fever in the last week. The scrotal ultrasonography (US) revealed increased flow of the left testicle in favour of the left EO. After seven days of antibiotic therapy, the patient´s condition worsened and developed into a scrotal abscess. The scrotal US showed scrotal abscess with the absence of left testicular arterial vascularity in favour of testicular necrosis. For that, a left orchiectomy was performed, and a histopathology report confirmed the diagnosis. In conclusion, testicular necrosis secondary to EO is a rare occurrence. When there is a suspicion of EO, medical therapy should be started as soon as possible to avoid significant complications.