What Is Testicular Torsion?

It often starts without warning — a sudden, strong pain in one testicle, sometimes in the middle of the night, sometimes after sport. If that ever happens to you or your son, don't wait to see if it settles. That kind of pain is exactly how testicular torsion tends to announce itself, and it needs emergency assessment the same day, as quickly as you can get it. The short video above, at under a minute, explains the basic problem clearly: a testicle rotates and twists the cord that carries its blood supply.

What exactly has twisted?

Each testicle hangs from a structure called the spermatic cord, which contains its blood vessels. In torsion, the testicle turns on that cord, the vessels twist with it, and blood flow is reduced or cut off. That is why the pain is usually sudden and severe, and why the scrotum on that side may swell and sit higher than usual. Nausea is common too. Because the tissue is being starved of blood, torsion is treated as a time-sensitive emergency rather than something to monitor at home.

How is it checked in the emergency department?

The team will start with a careful examination and a focused history — when the pain began matters a lot. They may check reflexes and feel how the testicle is lying, and an ultrasound scan with blood-flow assessment is often used to support the picture. Not every cause of testicular pain is torsion; infection and inflammation, including prostatitis in older patients — covered in our guide to what prostatitis is — can feel similar, which is one more reason a hands-on assessment matters more than guessing at home. If the clinical picture strongly suggests torsion, the team may proceed straight to surgery rather than delay for further tests.

What does treatment involve?

The aim is simple: untwist the cord and restore blood flow. That is normally done in an operation under anaesthesia, where the surgeon untwists the testicle, checks whether it recovers, and stitches it in place so it cannot twist again — a step called fixation. The other side is often fixed at the same time, since the looseness that allowed one side to twist is commonly present on both. If a testicle has been without blood for too long and cannot be saved, it may need to be removed; the site's longer surgical recording, "Orchidectomy and Orchidopexy in Testicular Torsion", at just over three minutes, shows both parts of that operation — removal on the damaged side and fixation on the other. Speed is what gives the testicle its best chance, which is why the message of this article is really one sentence long: sudden testicular pain means go now.

Frequently Asked Questions

What are the first signs of testicular torsion? Sudden, often severe pain in one testicle is the classic first sign, sometimes with swelling, the testicle sitting higher than usual, and nausea. It can start during sleep, after exercise, or for no clear reason at all.

Is testicular torsion an emergency? Yes. The twisted cord reduces or cuts off blood flow, so it needs emergency assessment and, where confirmed, prompt surgery to untwist it. Do not wait at home to see whether the pain eases.

How do doctors tell torsion from infection? By examining you, asking when the pain started, and often using an ultrasound scan that assesses blood flow. Infection and inflammation can cause similar pain, so the examination and scan findings together guide the decision.

Can a twisted testicle untwist on its own? It can occasionally ease, but that cannot be relied on, and pain easing does not prove blood flow is safe. Anyone with sudden testicular pain still needs urgent assessment, even if it seems to be getting better.

What happens after surgery for torsion? The testicle is untwisted, checked, and usually fixed in place so it cannot twist again; the other side is often fixed too. Your surgical team will explain recovery and follow-up for your own situation.

MedicalVideos.com has published trusted medical videos since 2007. The site was founded by Dr. Mohamed Ibrahim, MD, PhD — physician-scientist.

Educational only — this article is general information about testicular torsion, not medical advice and not a diagnosis. Sudden testicular pain needs urgent in-person assessment; if you have symptoms, seek emergency care and talk to your treating team.