Theoretically, the normal position of the testes is located in the scrotum, and the testes are pulled by the spermatic cords on both sides. Theoretically, the normal position of the testicles are located in the scrotum on both sides and are pulled by the spermatic cords on both sides respectively. Most of the time, the testicles are located at the bottom of the scrotum and are relatively flaccid, and the outer layer of the spermatic cords is wrapped by the levator muscle, when the levator muscle contracts, the testicles on both sides will rise, and this is the motivation for the testicles to rise, and the testicles can contract to the level of the upper part of the scrotum to the outer ring of the groin. When the body is under a colder or frightening external environment or stimulation, the levator muscle will produce contraction, thus pulling the testicles upward to contract, which is also a physiological reflex, a protective mechanism, also called the levator reflex, and is normal. However, if the testicles frequently contract upward, even beyond the external inguinal ring and into the inguinal canal, so as to cause pain or local discomfort, we call this situation retracted testicles or sliding testicles, which may be caused by factors such as short spermatic cords or spasm of the levator muscle, and sometimes it is necessary to exclude some inflammatory diseases of the genital system that cause the testicles to contract upward, and even testicular torsion that causes the testicles to contract upward. The testicles may also be contracted upwards due to testicular torsion. In these cases, it is necessary to go to the hospital for further examination to clarify the cause and further treatment if necessary.