Testicular torsion is time-sensitive
Sudden Severe Testicular Pain Needs Emergency Care
Go for immediate emergency assessment if you or your child has:
- Sudden severe pain in one testicle or one side of the scrotum.
- Testicular pain with nausea, vomiting or lower-abdominal pain.
- A testicle that suddenly sits higher, lies differently or becomes rapidly swollen.
- Severe pain lasting more than an hour or continuing while resting.
- Episodes of sudden pain that disappear and return, which can occur with intermittent twisting.
- Severe pain and swelling after an injury, especially with bruising, faintness or vomiting.
Testicular torsion twists the spermatic cord and can permanently damage the testicle without rapid treatment. Do not wait for a routine ultrasound or allow imaging to delay urgent urological or surgical assessment when the examination strongly suggests torsion.
What is a Scrotal Ultrasound?
A small high-frequency probe sends sound waves through warm water-based gel placed on the scrotal skin. Echoes are converted into detailed real-time images of the testicles and surrounding structures. The examination is external and does not use ionising radiation.
Both sides are usually examined even when symptoms affect only one side. Comparing the painful or abnormal side with the other testicle helps the radiologist judge size, texture and blood flow.
A Lump Inside the Testicle is Different From One Beside It
Ultrasound helps determine whether a lump lies within the testicle or in the epididymis, scrotal wall, fluid or veins around it. Many lumps outside the testicle are benign, while a solid lump within the testicle needs prompt urological assessment even when painless.
What Does Colour Doppler Add?
Colour and spectral Doppler analyse moving blood and display its direction and pattern on the screen. Standard scrotal Doppler does not require a needle, injection, contrast dye or radiation.
Doppler is very useful but not infallible. Some early, partial or intermittent torsions retain blood flow. Clinical history and examination remain crucial, and urgent exploration may still be necessary.
Why Might the Scan Be Requested?
Other indications can include:
- Suspected epididymitis, epididymo-orchitis or abscess.
- Known hydrocele, varicocele, spermatocele or epididymal cyst.
- Scrotal trauma, bruising or a possible testicular rupture.
- Follow-up of a known testicular or paratesticular finding.
- Locating a testicle that is not normally positioned in the scrotum.
- Assessment after selected operations, procedures or treatment.
- Evaluation of a suspected groin or scrotal hernia when ultrasound is appropriate.
- Guiding aspiration or another carefully selected procedure.
Ultrasound is not a substitute for examination. Tell the clinician exactly where you feel the lump or pain, whether it changes while standing and whether symptoms began suddenly or gradually.
Which Structures Are Examined?
How Should I Prepare?
A routine scrotal ultrasound needs no fasting, full bladder, injection or special diet. Take regular medicines normally unless another procedure has separate instructions.
- Wear loose, comfortable clothing that is easy to lower or remove.
- Normal bathing is sufficient; shaving or trimming is not required.
- Bring the referral and previous ultrasound, operation, laboratory or semen-analysis reports.
- Tell the team about the exact lump, side of pain, onset, trauma, fever, urinary symptoms or fertility concern.
- Mention severe tenderness, wounds, dressings, recent surgery or difficulty standing for a varicocele study.
- Children should attend with a parent or authorised guardian according to hospital policy.
At SR Speciality Hospital, the examination is performed by female radiologist Dr. Priyanka Venu with strict privacy and professional draping. Tell the booking team if you have concerns or would like a chaperone present.
What Happens During the Scan?
The radiologist asks which side is affected, how symptoms began, whether a lump changes with position and whether infection, injury, surgery or fertility assessment is relevant.
Clothing is lowered or removed from the waist down behind a screen. You lie on your back and are draped so only the area being examined is exposed.
A towel may support the scrotum and the penis is kept out of the scanning field under the drape. Gel is placed directly on the scrotal skin.
The small probe is moved gently across each side. Images and measurements of both testes, epididymides and surrounding structures are recorded for comparison.
Blood flow is compared without an injection. You may be asked to keep still because small movements can affect sensitive Doppler measurements.
For suspected varicocele or hernia, part of the examination may be performed while standing, coughing or gently bearing down if safe and clinically necessary.
The scan usually takes about 15–30 minutes. It should not be painful, although gentle pressure over an inflamed or injured area can be uncomfortable. Tell the radiologist immediately if pain increases.
What Do Common Report Terms Mean?
What Can Scrotal Ultrasound Not Determine Reliably?
- The exact cell type of every solid testicular or paratesticular mass.
- Every case of early, partial or intermittent testicular torsion from blood-flow images alone.
- All causes of infertility; semen analysis, hormone tests and clinical assessment remain important.
- An abdominal undescended testicle when bowel gas prevents visualisation.
- A small or intermittent hernia that is not present during the examination.
- Pain referred from the kidney, groin, hip, spine, nerves or pelvic floor.
- Microscopic infection or cancer when no structural change is visible.
A normal scan does not cancel a convincing emergency history, persistent hard lump or progressive symptom. Return for clinical review if symptoms continue, worsen or recur.
What Happens After the Scan?
The report is considered with examination, symptom timing and laboratory tests. Many findings are benign, while others require medical, urological or surgical treatment.
- No further imaging for a confidently benign, asymptomatic finding.
- Urine culture, STI testing or blood tests when infection is suspected.
- Antibiotic and clinical follow-up for epididymitis or epididymo-orchitis as prescribed.
- Urology review for persistent symptoms, hydrocele, varicocele, fertility concerns or an undescended testicle.
- Tumour-marker blood tests and urgent urology review for a suspicious intratesticular mass.
- Repeat ultrasound to document resolution, stability or response to treatment when recommended.
- Emergency surgical assessment when torsion, rupture, abscess or an incarcerated hernia is suspected.
Ask who will communicate the result and arrange the next step. Seek urgent reassessment if severe pain develops after a reassuring earlier scan.
Myth vs Fact
Frequently Asked Questions
Do I need to fast or fill my bladder?
No. Routine scrotal ultrasound requires neither fasting nor a full bladder. Eat, drink and take regular medicines normally unless another examination is booked.
Do I need to shave before the scan?
No. Normal personal hygiene is sufficient. Hair does not prevent a diagnostic examination because gel creates contact between the probe and skin.
Will both testicles be scanned?
Usually, yes. The unaffected side provides an important comparison for testicular size, texture and blood flow even when symptoms are one-sided.
Is the examination painful?
It is usually painless. An inflamed, twisted or injured testicle may be very tender, so the radiologist uses gentle pressure and adapts the examination. Severe acute pain needs emergency care.
How is privacy maintained?
You undress in private and are covered so only the scrotum is exposed. The penis is kept outside the scanning area beneath the drape, and a chaperone can be present.
Why might I be scanned while standing?
Varicoceles and some hernias become more visible with gravity and straining. The radiologist may compare lying and standing views if this is safe and relevant.
Can ultrasound confirm testicular cancer?
It can identify a suspicious intratesticular mass but cannot provide the final cell diagnosis. Prompt urology review and tumour-marker blood tests guide the next step.
Can a varicocele explain infertility?
A varicocele may affect fertility in selected patients, but its presence does not prove the cause. Semen analysis, examination, testicular size, hormones and the couple's complete assessment matter.
When will I receive the result?
The radiologist reviews the images and issues a report to the referring clinician. Urgent findings are communicated through the appropriate pathway. Ask before leaving how and when the result will be discussed.