Sudden, severe pain in the testicle or lower abdomen is a medical emergency. Doctors rule out testicular torsion by taking a quick history, performing a physical exam, and using a Doppler ultrasound to check blood flow to the testicle. If blood flow is absent or significantly reduced, emergency surgery is needed to save the testicle.
What Is Testicular Torsion and Why Is It an Emergency?
Testicular torsion happens when the spermatic cord—the bundle of vessels, nerves, and tubes that supplies the testicle—twists. This cuts off blood flow to the testicle. Without oxygen, the testicle tissue begins to die within hours.
The condition is most common in adolescent boys and young men, but it can happen at any age, including in newborns. It is not caused by injury in most cases. Often it occurs spontaneously or during sleep.
Time is critical. If the blood supply is not restored quickly, the testicle may need to be surgically removed. Emergency surgery within 6 hours of the start of pain gives the best chance of saving the testicle. After 12 hours, the risk of permanent damage or loss rises sharply.
What Symptoms Suggest Testicular Torsion?
The classic symptom is sudden, severe pain in one testicle. The pain may come on without warning and often radiates to the lower abdomen or groin. Nausea and vomiting are common.
Other signs include swelling of the scrotum, redness, and a high-riding testicle (the testicle sits higher than usual). The affected testicle may also lie horizontally instead of vertically. In some cases, the pain is less intense, or it comes and goes, which can happen if the testicle twists and untwists on its own.
Not everyone with testicular torsion has all of these symptoms. Some men have only dull abdominal pain. This is why doctors rely on quick examination and imaging to rule it out.
How To Rule Out Testicular Torsion What Doctors Do
Doctors follow a structured process to rule out testicular torsion. They start with the patient’s history and a detailed physical exam. They ask about when the pain started, how severe it is, and whether there has been any nausea or vomiting. They also ask about recent injury, fever, or urinary symptoms—clues that suggest an infection instead.
During the physical exam, the doctor checks the scrotum for swelling, redness, and tenderness. They lift the testicle gently to see if the pain changes. In testicular torsion, lifting the testicle often makes the pain worse or does nothing. In infections like epididymitis, lifting the testicle may actually relieve some pain (a sign called Prehn’s sign). The doctor also checks the cremasteric reflex—a normal reflex where the testicle lifts when the inner thigh is stroked. This reflex is usually absent on the side of a torsion.
If the history and exam raise concern for torsion, the next step is imaging. A color Doppler ultrasound is the most common and reliable test. It uses sound waves to look at blood flow in the testicle. If flow is absent or very weak, torsion is highly likely. If flow is normal, torsion is essentially ruled out—but only if the ultrasoundis done while the pain is present and the testicle is in its twisted position.
Sometimes the ultrasound is inconclusive. In those cases, the doctor may order a nuclear medicine scan or proceed directly to surgery for exploration. When a patient has severe pain and a strong suspicion of torsion, some surgeons will operate without imaging to save time.
What Tests Confirm or Rule Out Torsion?
Doppler ultrasound is the standard test. It is fast, noninvasive, and widely available. A normal result with good blood flow effectively rules out torsion if symptoms are present. But the result is only reliable if the ultrasound is done while the patient still has pain. If the pain has stopped—possibly because the testicle untwisted—blood flow may appear normal even if torsion just occurred.
Urine tests are often done to check for white blood cells or bacteria. If the urine shows signs of infection, the cause of pain is more likely to be epididymitis or another infection, not torsion. But infection and torsion can sometimes happen together, so a negative urine test does not completely rule out torsion.
Nuclear medicine scan uses a small amount of radioactive dye to image blood flow. It is very accurate but takes longer and is not available in all emergency departments. It is used mainly when the ultrasound is unclear.
Surgical exploration is both the definitive test and the treatment. A surgeon makes a small incision in the scrotum to look directly at the testicle. If the spermatic cord is twisted, the surgeon untwists it and fixes the testicle in place to prevent future torsion. This is done under general anesthesia and is the only way to absolutely confirm and fix torsion.
What Other Conditions Can Mimic Testicular Torsion?
Several conditions cause testicle pain and swelling. The most common one mistaken for torsion is epididymitis, an infection of the tube behind the testicle. It usually develops more slowly than torsion and often includes fever, burning with urination, and discharge. The pain may be relieved when the testicle is lifted—a clue that points away from torsion.
Torsion of the appendix testis is another mimic. The appendix testis is a small piece of tissue on the testicle that can twist and die. This causes pain that builds over a day or two, with a small blue or black dot visible on the skin at the upper pole of the testicle. It does not require surgery and resolves on its own with rest and pain relievers.
Orchitis is a viral or bacterial infection of the testicle itself. Mumps is a classic cause. It is usually associated with swelling and fever, and the pain comes on more gradually than torsion.
Incarcerated hernia and trauma can also cause acute scrotal pain. Doctors consider these possibilities based on the history and exam.
What Happens If Torsion Is Confirmed or Ruled Out?
If torsion is confirmed by ultrasound or surgical exploration, the surgeon untwists the cord and secures both testicles with stitches so they cannot twist again. The other testicle is always fixed at the same time because the condition can occur on both sides. This surgery, called orchiopexy, is done as an emergency.
If torsion is ruled out, the doctor treats the cause of pain accordingly. For epididymitis, antibiotics and rest are given. For torsion of the appendix testis, pain relievers and scrotal support are usually enough. The patient is told to follow up with a urologist if symptoms worsen or do not improve.
In cases where the diagnosis remains uncertain after imaging, the safest approach is surgical exploration. Missing a torsion has serious consequences. Exploring a normal testicle is far better than delaying treatment for a real torsion.
Frequently Asked Questions
Can testicular torsion resolve on its own?
No. Torsion cannot untwist permanently on its own without surgery. Sometimes the spermatic cord twists and then spontaneously untwists, but torsion can happen again, and the risk of permanent damage remains.
How long can you wait before seeing a doctor for testicular pain?
You should see a doctor immediately. Every minute counts. The chance of saving the testicle drops significantly after 6 hours of pain.
Can a Doppler ultrasound miss testicular torsion?
Yes, in rare cases. If the ultrasound is done after the testicle has partially untwisted, blood flow may appear normal even though torsion just occurred. That is why doctors consider the whole picture—symptoms, exam, and imaging—and sometimes operate even with a normal ultrasound if suspicion is high.
Is testicular torsion always painful?
Most of the time yes, but the pain can be mild or felt only in the abdomen. Some men have intermittent pain that comes and goes. Any unexplained testicle or groin pain should be checked.
