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Symptoms · Scrotal Swelling Scrotal swelling? Some causes are urgent.

Scrotal swelling can range from a painless build-up of fluid to a surgical emergency - however most causes are straightforward once investigated. Seen within days at 4 private London hospitals. No GP referral needed.

Mr Maneesh GheiAssessed personally by Mr Maneesh GheiConsultant Urological Surgeon · GMC 5208045BupaPlatinum Consultant
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In short

Scrotal swelling is enlargement of the scrotal sac, and can be caused by infection, a build-up of fluid, enlarged veins, a hernia or, rarely, a tumour. Sudden, severe pain needs immediate attention because it may be testicular torsion - a medical emergency - however most causes are properly investigated and treated by a urologist.

Medically reviewed by Mr Maneesh Ghei·GMC 5208045·September 2026

Seek emergency help immediately if you have sudden, severe scrotal pain:

Especially alongside nausea or vomiting. This may be testicular torsion, a medical emergency needing immediate surgery to save the testicle.

What Causes It

Several possible causes

Testicular torsion

A sudden twisting of the spermatic cord, cutting off blood supply to the testicle. A medical emergency requiring immediate surgery.

Infections

Epididymitis or orchitis cause inflammation, swelling, redness and warmth in the scrotum.

Hydrocele or varicocele

A build-up of fluid, or enlarged veins around the testicle, often causing a heavy or aching feeling.

Hernia or lump

Abdominal tissue protruding into the scrotum, or a lump that needs prompt assessment to rule out a tumour.

Simple, Fast, Clear

From symptom to answer in 3 steps

1

Book a Consultation

See Mr Ghei at one of 4 London private hospitals. No GP referral needed. Most patients are seen within a few days of enquiry.

2

Examination and Scan

A physical examination and, where needed, an ultrasound scan to identify the cause promptly.

3

The Right Treatment

From antibiotics for infection to surgery for torsion, hernia or a persistent hydrocele or varicocele.

Mr Maneesh Ghei, Consultant Urological Surgeon
GMC 5208045 · FRCS (Urol)
Your Consultant

Mr Maneesh Ghei

MBBS, MS, MRCSEd, MD (UCL), FRCS (Urol)

Mr Ghei is a consultant urological surgeon with a specialist focus on prostate diagnosis and treatment. He holds a Research MD from University College London and is a Fellow of the Royal College of Surgeons.

In his NHS role he is Cancer Lead and Academic Lead at Whittington Hospital London - one of a small number of consultant urologists in the UK to hold both positions. Every private patient is cared for by Mr Ghei personally, from first appointment through to any treatment that follows.

Cancer Lead · Whittington Hospital BupaPlatinum recognised consultant English · Hindi · Punjabi · Urdu
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Common Questions

Before you book

Is scrotal swelling always serious?
Not always - a painless hydrocele or varicocele is common and not usually dangerous. However, any new swelling or lump should be checked by a urologist, because some causes, including a tumour, need prompt diagnosis.
When is it a medical emergency?
Sudden, severe scrotal pain, especially with nausea or vomiting, can indicate testicular torsion - a twisting of the spermatic cord that cuts off blood supply. This needs immediate surgery, so treat it as an emergency and seek help straight away.
How is scrotal swelling investigated?
A urologist will examine the scrotum and, where needed, arrange an ultrasound scan to identify the cause - whether that is fluid, enlarged veins, a hernia, infection or a lump.
How quickly can I be seen?
Most patients are seen within a few days of enquiry, with no GP referral needed. For sudden severe pain, go to A&E immediately rather than waiting for an appointment.
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