Testicular Torsion is when tissues around the testicle (also known as the "testis") are not attached well. This can cause the testes to twist around the spermatic chord. When this happens, it cuts off the blood flow to the testicle. It can cause pain and swelling, and should be treated as an emergency.
What Happens Normally?
The testicles (or "testes") are 2 organs that hang in a pouch of skin. The pouch is called the scrotum. It sits below the penis. This is where sperm and male sex hormone (testosterone) are made. The blood supply for each testicle comes from the spermatic cord. This cord starts in the abdomen and extends into the scrotum. This cord also contains the vas deferens, which carries sperm from the testicles to the urethra.