Hidden pain in the right testicle and lower abdomen is commonly caused by testicular torsion, acute epididymitis, varicocele and so on. 1. Testicular torsion: this disease refers to the torsion of the spermatic cord that governs the testicles in the body and blocks the blood supply to the testicles. The onset of the disease is relatively sudden in the sick people, who usually wake up from pain in the middle of their sleep, and the pain in the early stage is mostly hidden, and when the condition deteriorates later on, persistent severe pain, nausea, vomiting and other symptoms will appear. 2. Acute epididymitis: this disease is usually accompanied by a variety of acute infectious diseases, such as mumps, etc., which is often infected through the lymphatic route or blood-borne infection, clinical manifestations include testicular swelling and pain, scrotum redness and swelling, and lower abdominal pain. 3. Varicose veins of the spermatic cord: this refers to the abnormal expansion, tortuous and elongation of the spermatic cord trailing vein plexus, belonging to a class of vascular lesions, the clinical manifestations of the affected side of the scrotum increased, accompanied by a feeling of swelling, hidden pain. When there are related symptoms, the situation is generally more serious, it is recommended to go to the hospital in time to consult and receive treatment.