In brief: A scrotal ultrasound is commonly used to assess a new lump, swelling or persistent discomfort. It can assess the testicles, surrounding structures and blood flow, but it does not replace clinical assessment. If you have sudden severe pain, nausea, vomiting or rapidly increasing swelling, go to A&E or call 999 immediately because testicular torsion is a time-critical emergency.
When to seek help
A new lump, a persistent change in size or texture, or an ongoing ache should be assessed promptly. Testicular symptoms have many possible causes, including infection, a hydrocele, an epididymal cyst, varicocele and, less commonly, testicular cancer. An ultrasound can help clarify the pathway, but it cannot tell the whole clinical story on its own.[2] [3]
Emergency symptoms: do not wait for a private scan
Call 999 or attend A&E immediately for sudden severe testicular pain or swelling, especially with nausea, vomiting, abdominal pain, faintness or a high-riding testicle. These symptoms can occur with testicular torsion and need emergency assessment.
What an ultrasound can assess
| Finding or question | How ultrasound can help | Next step |
|---|---|---|
| New testicular lesion | May show whether a change is within the testicle and describe its features | Urgent urology assessment may be needed |
| Fluid or swelling | Can assess hydroceles and related structures | Clinical context guides whether any treatment is needed |
| Possible varicocele | Can assess veins and Doppler blood-flow features | May be relevant to symptoms or fertility assessment |
| Pain or inflammation | Can assess blood flow and inflammatory changes | The clinician decides whether emergency, infection or other pathways apply |
What happens during the scan
For a scrotal ultrasound, clothing is lowered as needed and gel is applied to the skin while images are taken of the relevant structures. Ultrasound is generally well tolerated, although pressure or temporary discomfort can occur if the area is tender. You can ask to pause at any time. The clinic confirms reporting and follow-up arrangements for the selected pathway at booking.
Evidence-only information
Scrotal symptoms can feel embarrassing, but a new or persistent change deserves medical assessment. Imaging is interpreted with symptoms and examination, and urgent symptoms need emergency care rather than a routine scan.
Frequently asked questions
Is a testicular ultrasound painful?
Ultrasound is generally well tolerated. The probe is moved across the skin with gel; temporary pressure or discomfort can occur if the area is already sore. Tell the sonographer if you need to pause or adjust pressure.
Do I need a referral?
The clinic confirms the appropriate appointment route, any referral requirements, and whether a testicular ultrasound may be suitable for your symptoms at booking. Sudden severe pain needs emergency assessment rather than a routine booking.
What can an ultrasound show?
It can assess the testicles, epididymis, fluid around the testicle and blood flow. It can help identify changes that need further assessment, but the result is interpreted alongside your symptoms and clinical examination.
What if something abnormal is found?
The clinician will explain what the finding may mean and arrange the appropriate next step. A suspicious testicular lesion usually needs an urgent urology pathway; the route depends on the full clinical picture.
References
- [1] Cancer Research UK. Testicular cancer statistics. View source
- [2] NICE. Suspected cancer: recognition and referral (NG12). View source
- [3] Dogra VS, Gottlieb RH, Oka M, Rubens DJ. Sonography of the scrotum. Radiology. 2003;227(1):18–36. View source
- [4] European Association of Urology. Guidelines on Testicular Cancer. View source
About this information
This is evidence-only patient information. It does not provide a named clinician review, a diagnosis or a personalised care plan.