The normal human body has two testicles, which are located in the scrotum on both sides, one on each side, and the size is basically the same. The common diseases that cause testicular disparity are testicular swelling, testicular syringomyelia and testicular torsion, etc. Therefore, we should pay enough attention to testicular diseases after they appear. The testicles are an important organ for the production of sperm in the human body, and active treatment should be carried out after a lesion occurs, otherwise it will cause more serious consequences. Usually, testicular diseases need to be clearly diagnosed through scrotal ultrasound and other related auxiliary examinations, and once diagnosed, a reasonable treatment plan should be adopted according to different causative factors to avoid further damage to testicular function.