Testicular trauma caused by a large and a small, may be one of the testicular trauma caused by the affected side of the testicle contusion, and then edema, may also be a serious trauma bleeding and lead to the formation of hematoma in the scrotum accumulation of blood, the damaged testicle occurs when the atrophy, can also appear a large and a small, need to be combined with ultrasound and other related examinations, to clarify the condition. 1. Edema: after the testicle is subjected to external force, it is easy to cause contusion on the testicle on the side of the force, which may cause edema of the soft tissue of the testicle, which is larger compared with the healthy side. After rest and related conservative treatment (Yunnan Baiyao aerosol, etc.), it can be recovered by itself. 2. hematoma: if the role of external force is large, it can also lead to testicular or scrotal tissue laceration bleeding, blood accumulation in the scrotum, hematoma can be formed. So it will show a big and a small performance, for the smaller hematoma can be self-absorbed, while the larger ones need to be given surgery to stop bleeding and drainage. 3. Post-traumatic atrophy: when the testicle is traumatized, the blood vessels of the testicle are injured, which can affect the blood supply of the testicle, thus leading to testicular atrophy and even testicular necrosis. There are other reasons for the trauma of a big testicle and a small testicle, the specific circumstances need to go to the hospital, improve the auxiliary examination, in order to clarify the condition, active treatment, drugs need to be used under the guidance of a professional physician.