Sudden testicular pain that disappears on its own can be confusing. You may experience severe pain in one testicle, only for it to settle before you reach a doctor. An ultrasound performed afterwards might even appear completely normal.
One possible explanation is a condition called intermittent testicular torsion, sometimes referred to as torsion–detorsion syndrome.
But is this a genuine medical condition, or simply a theory used to explain unexplained testicular pain?
The short answer is yes, intermittent testicular torsion is a recognised clinical condition, supported by published urological research. However, diagnosing it can be difficult, particularly when symptoms have disappeared before examination. Not every episode of unexplained testicular pain is caused by torsion. [1–3]
Understanding the condition matters because some patients may develop a prolonged episode of testicular torsion, which can permanently damage the testicle if blood flow is not restored promptly.
Important: Sudden testicular pain requires immediate assessment at the nearest emergency department, even if it begins to improve or has completely settled. Do not wait for a routine specialist appointment.
What Is Testicular Torsion–Detorsion Syndrome?
Testicular torsion occurs when a testicle rotates inside the scrotum, twisting the spermatic cord.
The spermatic cord contains the blood vessels that supply the testicle. When it twists, blood flow can become reduced or completely blocked.
If the twisting persists, the testicle may be permanently damaged.
In intermittent testicular torsion, the testicle is believed to twist temporarily and then spontaneously untwist.
This process is called:
Torsion: The testicle twists, potentially reducing its blood supply and causing pain.
Detorsion: The testicle untwists, allowing blood flow to return and the pain to improve or disappear.
Episodes may occur repeatedly, sometimes with weeks or months between them.
The important difference from persistent testicular torsion is that the twisting resolves spontaneously. However, there is no way for a patient to reliably predict whether the next episode will resolve.
Is Intermittent Testicular Torsion Scientifically Proven?
There is published scientific evidence supporting intermittent testicular torsion as a genuine clinical phenomenon.
Researchers have described patients experiencing repeated episodes of sudden testicular pain that resolve spontaneously. In selected patients undergoing surgery, anatomical abnormalities associated with testicular twisting have been identified. Studies have also reported improvement in symptoms following surgical fixation of the testicles. [1–3]
A study published in the Journal of Urology in 2005 examined 50 children and adolescents diagnosed with intermittent testicular torsion. The researchers found that recurrent episodes of severe pain with sudden onset and rapid resolution were characteristic features. An abnormal horizontal position of the testicle was also associated with an anatomical finding known as the bell-clapper deformity. [1]
Research in adults has reported similar clinical patterns. [2,3]
However, there are important limitations to the evidence.
Most studies involve relatively small numbers of patients, and there are no large randomised trials establishing a perfect diagnostic test or comparing every available treatment.
A history of recurring testicular pain, by itself, does not prove that torsion has occurred.
Therefore, intermittent testicular torsion is best understood as a recognised clinical diagnosis supported by characteristic symptoms, examination findings and sometimes surgical findings, rather than a condition that can always be confirmed by a single investigation.
What Causes a Testicle to Twist and Untwist?
Normally, the testicles are supported by tissues within the scrotum that limit excessive rotation.
Some people have an anatomical variation called the bell-clapper deformity.
In this condition, the testicle is not anchored in its usual position and may move or rotate more freely within the scrotum.
This increased mobility can make twisting of the spermatic cord more likely.
The bell-clapper deformity may affect both testicles, even when symptoms have only occurred on one side. [1,5]
Testicular torsion can happen during normal activities, physical exercise or sleep. A clear trigger is not always present.
It can occur in children, teenagers and adults, although testicular torsion is more common around puberty.
What Are the Symptoms of Torsion–Detorsion?
The most characteristic symptom is sudden testicular pain that subsequently resolves.
Patients may describe pain that begins without warning, becomes intense quite quickly and then improves over minutes or hours.
Other possible features include:
Sudden pain affecting one testicle
Repeated episodes of pain that settle spontaneously
Nausea or vomiting during painful episodes
Temporary scrotal swelling or tenderness
Pain extending into the groin or lower abdomen
A noticeable change in the position of the testicle
Some patients notice that the affected testicle appears higher, more horizontal or positioned differently during an episode.
Between episodes, the testicle may feel completely normal.
This pattern of severe pain followed by spontaneous improvement is an important reason to consider intermittent torsion, although other causes of testicular pain must also be assessed. [1,2]
Can You Have Testicular Torsion With a Normal Ultrasound?
Yes.
This is one of the most important and potentially misleading features of intermittent testicular torsion.
A scrotal Doppler ultrasound assesses blood flow within the testicles. During a significant torsion episode, blood flow may be reduced or absent.
However, if the testicle has already untwisted, blood flow may have returned to normal by the time the ultrasound is performed.
Consequently, the scan can appear normal despite a history that raises suspicion of intermittent torsion.
Furthermore, even during an episode of torsion, some blood flow may remain detectable.
A review published in Pediatric Radiology described how partial and intermittent torsion may occur with preserved blood flow, potentially creating a false impression that torsion is absent. [5]
The European Association of Urology (EAU) guidelines similarly emphasise that the presence of blood flow on Doppler ultrasound does not exclude testicular torsion. [4]
A normal ultrasound does not necessarily rule out intermittent testicular torsion.
Equally, a normal ultrasound is not evidence that torsion has occurred. Imaging findings must be considered alongside the patient's symptoms and examination.
How Is Intermittent Testicular Torsion Diagnosed?
Diagnosis begins with a detailed medical history and physical examination.
A urologist will usually want to understand how suddenly the pain begins, how severe it becomes, how long it lasts and whether it stops without treatment.
The pattern of previous episodes can be particularly important.
During examination, the doctor may assess the position and mobility of each testicle and look for other explanations for the pain.
Investigations may include a scrotal Doppler ultrasound and urine tests, depending on the circumstances.
An ultrasound can help identify other causes of pain or swelling, including infection, fluid collections and testicular abnormalities.
Occasionally, imaging performed during an episode may identify twisting of the spermatic cord, sometimes described as the whirlpool sign. [5]
However, there is no single investigation that reliably confirms or excludes every case of intermittent torsion.
When acute torsion remains a significant concern, urgent surgical exploration may be necessary rather than relying on imaging alone. [4]
What Else Could Cause Testicular Pain That Comes and Goes?
Not all recurrent scrotal pain is caused by testicular torsion.
Other possible explanations include:
Epididymitis or inflammation of the epididymis
Torsion of a testicular appendage
Inguinal hernia
Referred pain from kidney or ureteric stones
Nerve-related or musculoskeletal pain
Other causes of chronic or intermittent scrotal pain
Benign abnormalities such as epididymal cysts and spermatoceles may also be associated with discomfort, although their typical symptoms differ from those of intermittent torsion.
Identifying the correct cause matters because the treatment options vary substantially.
Further information about other conditions is available in our scrotal and testicular conditions guide.
Is Torsion–Detorsion Dangerous?
Potentially, yes.
The main concern is that an episode of twisting may eventually fail to resolve spontaneously.
If the spermatic cord remains twisted, the blood supply to the testicle can become severely restricted.
This is a surgical emergency.
A study published in the Journal of Urology in 2008 compared children treated electively for intermittent torsion with children who required emergency surgery after developing sustained torsion. Testicular preservation was substantially lower in the emergency group. [6]
Although this was a small retrospective study and cannot predict an individual patient's risk, it supports the concern that recurrent torsion may precede a more serious episode.
The EAU guidelines recommend urgent treatment of suspected testicular torsion, ideally as early as possible, because the likelihood of preserving the testicle decreases as the duration and severity of interrupted blood flow increase. [4]
Even when pain improves, there may still be uncertainty about whether the testicle has fully untwisted.
This is why sudden testicular pain should not be ignored.
How Is Intermittent Testicular Torsion Treated?
Treatment depends on the clinical circumstances, the likelihood of torsion and whether an acute episode is occurring.
Emergency treatment
If a patient presents with suspected ongoing testicular torsion, urgent surgical exploration may be required.
The operation allows the surgeon to examine the testicle, untwist the spermatic cord if necessary and assess whether the testicle remains viable.
When appropriate, the testicle is fixed within the scrotum to reduce the likelihood of twisting again.
The opposite testicle is also commonly fixed when torsion is confirmed because the anatomical predisposition may be present on both sides. [4,7]
Planned surgery for recurrent intermittent torsion
For patients with recurring episodes strongly suggestive of intermittent torsion, a urologist may discuss an operation called orchidopexy.
Orchidopexy involves positioning and securing the testicle within the scrotum to reduce its ability to twist.
In patients with suspected intermittent torsion, fixation of both testicles may be considered, even if pain has only occurred on one side.
The decision requires an individual assessment of the likelihood of torsion, other possible causes of pain, the risks of surgery and the patient's circumstances.
Orchidopexy is not automatically appropriate for every patient with intermittent testicular discomfort.
Does Orchidopexy Work for Intermittent Testicular Torsion?
Published studies suggest that orchidopexy can reduce the risk of further torsion and may improve pain in appropriately selected patients.
A prospective cohort study published in BJUI Compass in 2024 followed 50 men who underwent bilateral orchidopexy for intermittent testicular torsion.
At an average follow-up of approximately 33.5 months, 44 men (88%) reported complete resolution of pain, while six (12%) reported improvement without complete resolution. No testicular loss from torsion occurred during the reported follow-up. [3]
Another adult study, published in Medical Principles and Practice in 2017, examined 63 men. Pain improved or resolved in 18 of the 19 patients who underwent orchidopexy, compared with 21 of 44 patients who selected conservative treatment. [2]
These findings are encouraging but must be interpreted carefully.
Both studies involved relatively small patient groups, and neither was a randomised comparison of surgery against non-surgical treatment. The results may not apply to patients whose testicular pain has another cause.
Surgery also carries risks, including bleeding, infection, swelling, ongoing discomfort, anaesthetic complications and, rarely, injury to the testicle or its blood supply.
Testicular torsion can occasionally recur despite previous fixation.
For these reasons, orchidopexy cannot be described as a guaranteed cure for intermittent testicular pain.
Can Torsion–Detorsion Affect Fertility?
Testicular function depends on maintaining an adequate blood supply.
A prolonged episode of testicular torsion can damage the tissues responsible for sperm production and testosterone production.
Repeated episodes of reduced blood flow may also raise concerns about testicular health, although the precise long-term effects of intermittent torsion on fertility are not well established.
The EAU guidelines recognise potential fertility and hormonal consequences after testicular torsion, particularly when there has been significant testicular injury. [4]
However, experiencing intermittent testicular pain does not automatically mean fertility has been affected.
Fertility investigations, such as semen analysis, may be appropriate in selected patients depending on their history, examination findings and reproductive goals.
What Do Urological Guidelines Recommend?
The European Association of Urology guidelines identify testicular torsion as an emergency requiring prompt assessment and treatment.
They emphasise that diagnosis relies on clinical findings, Doppler ultrasound is a useful additional investigation, and imaging must not delay necessary surgical treatment. [4]
The British Urology Researchers in Surgical Training and British Association of Urological Surgeons FIX-IT consensus also provides recommendations for surgical exploration and testicular fixation when torsion is suspected. [7]
These recommendations primarily address acute testicular torsion rather than providing a separate, high-certainty treatment algorithm for every patient with suspected intermittent torsion.
For patients whose episodes have already resolved, decisions about elective orchidopexy are based on individual clinical assessment and the available, mainly observational, evidence.
Frequently Asked Questions
Can testicular torsion fix itself?
A testicle can sometimes untwist spontaneously, allowing pain to improve. This is called spontaneous detorsion. However, there is no reliable way to know whether it will happen during an episode, and pain relief does not always establish that the problem has fully resolved. Sudden testicular pain needs emergency assessment.
Can intermittent testicular torsion happen in adults?
Yes. Although testicular torsion is more common in adolescents, intermittent torsion has been described in adult men, including in published surgical studies. [2,3]
Can testicular torsion happen repeatedly?
Yes. Repeated episodes of sudden pain followed by spontaneous resolution are characteristic of suspected intermittent torsion. However, recurrent pain can also have other explanations and requires appropriate medical assessment.
Can torsion–detorsion happen without swelling?
Yes. Swelling may be absent, particularly if the episode has resolved before examination. The absence of visible swelling does not exclude torsion.
Do I need surgery if the pain has stopped?
Not necessarily. Sudden testicular pain that has settled still requires urgent assessment. If acute torsion has been appropriately excluded and intermittent torsion is subsequently suspected, a urologist can discuss whether observation or planned surgical fixation is appropriate.
Assessment of Recurrent Testicular Pain in Brisbane
Recurrent episodes of sudden testicular pain can be difficult to investigate, particularly when examination and ultrasound findings are normal between attacks.
Dr Jack Crozier is a Brisbane-based urologist and andrologist who assesses testicular and scrotal conditions, including patients with persistent or recurrent symptoms.
Consultations are available at Greenslopes and Springwood.
Assessment may involve reviewing previous emergency department presentations, ultrasound findings, the pattern of symptoms and any previous investigations or treatment.
Where appropriate, the discussion may include further investigation, observation or the role of surgical treatment.
Patients in regional Queensland, interstate Australia and overseas may be able to arrange an initial review of their history and existing investigations before travelling, where clinically appropriate.
International patients can find further details on the international patient information page.
For non-emergency assessment of recurrent testicular symptoms, you can request an appointment with Dr Jack Crozier.
If you develop sudden testicular pain, do not wait for a specialist appointment, telehealth consultation or travel arrangements. Attend the nearest emergency department immediately.
Take home message
Torsion–detorsion syndrome, more commonly called intermittent testicular torsion, is a recognised clinical condition supported by published scientific research.
It can cause repeated episodes of sudden testicular pain that disappear spontaneously, sometimes leaving a normal examination and ultrasound.
However, it remains a clinical diagnosis, and other explanations for recurrent pain must be considered.
When intermittent torsion is strongly suspected, orchidopexy may be discussed to reduce the risk of further twisting. The decision depends on an individual assessment, and surgery does not guarantee complete pain relief.
Most importantly, sudden testicular pain should always be treated as potentially urgent, even when it improves.
References
Eaton SH, Cendron MA, Estrada CR, Bauer SB, Borer JG, Cilento BG, et al. Intermittent testicular torsion: diagnostic features and management outcomes. J Urol. 2005;174(4 Pt 2):1532-1535. doi: 10.1097/01.ju.0000177726.84913.cc.
Al-Kandari AM, Kehinde EO, Khudair S, Ibrahim H, ElSheemy MS, Shokeir AA. Intermittent testicular torsion in adults: an overlooked clinical condition. Med Princ Pract. 2017;26(1):30-34. doi: 10.1159/000450887.
Hegarty PK, Kalantar M, Hegarty PA, Zafirakis H, Monahan JE. Bilateral orchidopexy for intermittent testicular torsion. BJUI Compass. 2024;5(11):1131-1136. doi: 10.1002/bco2.439.
European Association of Urology. EAU guidelines on paediatric urology: acute scrotum [Internet]. Arnhem: European Association of Urology; [cited 2026 Oct 15]. Available from: https://uroweb.org/guidelines/paediatric-urology/chapter/acute-scrotum
Bandarkar AN, Blask AR. Testicular torsion with preserved flow: key sonographic features and value-added approach to diagnosis. Pediatr Radiol. 2018;48(5):735-744. doi: 10.1007/s00247-018-4093-0.
Hayn MH, Herz DB, Bellinger MF, Schneck FX. Intermittent torsion of the spermatic cord portends an increased risk of acute testicular infarction. J Urol. 2008;180(4 Suppl):1729-1732. doi: 10.1016/j.juro.2008.03.101.
Clement KD, Light A, Asif A, Chan VWS, Khadhouri S, Shah TT, et al. A BURST-BAUS consensus document for best practice in the conduct of scrotal exploration for suspected testicular torsion: the Finding Consensus for Orchidopexy in Torsion (FIX-IT) study. BJU Int. 2022;130(5):662-670. doi: 10.1111/bju.15818.
Medical Disclaimer
This article provides general educational information and does not replace individual medical advice, diagnosis, examination or treatment by a qualified healthcare professional.
The information is based on published medical research and professional guidance available at the time of preparation. Medical evidence and clinical recommendations may change.
Intermittent testicular torsion cannot be diagnosed from symptoms alone. The investigations and management appropriate for an individual depend on their history, clinical examination, investigation results and circumstances.
Surgery carries potential benefits, limitations and risks. Outcomes vary between individuals, and no particular result can be guaranteed.
Sudden testicular or scrotal pain is a potential medical emergency. Seek immediate assessment at your nearest emergency department, even if the pain improves or resolves. In Australia, call 000 if emergency ambulance assistance is required.
