Clinically reviewed by
Mr Bijan Khoubehi
Chairman & Consultant Urological Surgeon · Reviewed June 2026 · Review due June 2027
Sudden Severe Testicular Pain — Go to A&E Immediately
Sudden, severe testicular pain — especially if associated with nausea, vomiting, or swelling — may indicate testicular torsion, a surgical emergency. Torsion is most common in teenagers and young men (peak age 12–18) but can occur at any age. The testicle's blood supply can be cut off, and surgery is required within 4–6 hours to prevent permanent damage.
Do not wait for a GP appointment or specialist referral. Go directly to your nearest emergency department.
Understanding Testicular Symptoms
Testicular symptoms — including lumps, swelling, and pain — are very common in men and boys of all ages. The vast majority are caused by benign (non-cancerous) conditions such as cysts of the epididymis, fluid collections, or infections that respond well to straightforward treatment.
However, testicular cancer is the most common cancer in men aged 15 to 49, and early detection leads to excellent outcomes — cure rates exceeding 95% in early-stage disease. For this reason, any new or changing testicular symptom should be assessed without delay.
Symptoms to Look Out For
The following symptoms should all prompt a specialist review. Most have a benign explanation — but each requires clinical assessment.
Painless lump or swelling
A lump on or inside a testicle — the most important symptom to investigate promptly.
Dull ache or heaviness
A persistent dull ache, dragging sensation, or feeling of heaviness in the scrotum or lower abdomen.
Scrotal swelling
Swelling of the whole scrotum, which may feel tense or fluid-filled.
Change in firmness or texture
A feeling of hardness, change in consistency, or altered size or shape of a testicle.
Tender or enlarged epididymis/testicle
Tenderness or swelling at the back of the testicle — often a sign of infection or cyst.
Common Causes — Most Are Benign
The great majority of testicular lumps and symptoms have a benign cause. Here are the most common conditions our specialists assess and treat:
Epididymal Cyst
Almost always benignA very common soft, fluid-filled lump that develops at the top or back of a testicle (in the epididymis). Usually causes no pain. Can be left alone, monitored, or surgically removed if troublesome.
Varicocele
BenignEnlarged veins within the scrotum, often described as feeling like a soft, irregular swelling. More common on the left side. Can cause a dull ache and is associated with reduced fertility in some men. Treatment options include monitoring, embolisation (minimally invasive), or surgical ligation.
Hydrocele
BenignA collection of fluid around the testicle that causes the scrotum to appear swollen and feel tense. Common in older men. Often painless. Surgical repair is available if the size causes discomfort or cosmetic concern.
Epididymo-orchitis
Infection — treatableInflammation or infection of the epididymis and/or testicle. Causes pain, swelling, and tenderness — often accompanied by fever. Usually caused by a bacterial infection and responds well to antibiotics. In younger sexually active men, sexually transmitted infections (such as chlamydia or gonorrhoea) are a common cause, and STI screening may be recommended. Prompt treatment prevents complications.
Testicular Torsion
Surgical emergencyThe spermatic cord twists and cuts off blood supply to the testicle. Causes sudden, severe scrotal pain — often with nausea and vomiting. Requires emergency surgery within hours to save the testicle. If you have sudden severe pain, go to A&E immediately — do not wait.
Testicular Cancer
Important to excludeUsually presents as a firm, painless lump within the testicle itself. Although most testicular lumps are not cancerous, testicular cancer must always be excluded. Ultrasound and, where indicated, blood tumour markers will guide the assessment. See our dedicated Testicular Cancer page for detailed information.
Inguinal Hernia
Benign — usuallyBowel or fatty tissue descending through the inguinal canal into the scrotum. Can be confused with a testicular swelling. Typically feels soft and may be reducible (pushed back). Requires surgical repair if symptomatic or causing complications.
When to Seek Help
Emergency — Go to A&E immediately
Sudden, severe testicular pain — especially if associated with nausea or vomiting. This may be testicular torsion, which requires surgery within hours. Do not wait for a GP appointment or a specialist referral.
Urgent — Be seen within days
Any new lump, swelling, or hardness in or around a testicle. Even if there is no pain, a new testicular mass must be assessed urgently to exclude cancer. Book directly with us for rapid access.
Soon — Book an appointment
A dull ache, feeling of heaviness, or general scrotal discomfort that has persisted for more than a week. These symptoms are usually benign but should be assessed to identify the cause and offer appropriate treatment.
How We Investigate Testicular Symptoms
A targeted assessment allows us to reach a diagnosis quickly and, in most cases, provide clear reassurance.
Clinical Examination
A thorough physical examination by our consultant. We assess the testicle, epididymis, and surrounding structures to characterise any abnormality and determine the most appropriate next step.
Scrotal Ultrasound Key investigation
A painless, non-invasive scan that provides detailed images of the testes and epididymis. Can reliably distinguish a benign epididymal cyst or hydrocele from a testicular mass, usually providing clear reassurance or directing the appropriate next step.
Blood Tumour Markers
AFP, beta-HCG, and LDH may be measured if a testicular mass is identified or cancer is suspected. These markers support diagnosis and, where relevant, help with staging and monitoring treatment response.
Urinalysis / Urine Culture
If infection (epididymo-orchitis) is suspected, a urine sample is tested for bacteria. A midstream urine culture helps identify the causative organism and guides antibiotic choice.
Treatment Options
Treatment is tailored to the underlying cause. Many conditions can be monitored if they are not causing symptoms, while others respond to straightforward medical or surgical treatment.
Epididymal cyst
Most cysts can be safely observed without treatment. If the cyst is large or troublesome, surgical excision (epididymal cystectomy) is a day-case procedure.
Hydrocele
Surgical repair (hydrocelectomy) is a day-case procedure performed under general anaesthetic. It involves draining and securing the fluid sac to prevent recurrence.
Varicocele
Small, asymptomatic varicoceles may simply be monitored. Larger or symptomatic varicoceles — or those impacting fertility — can be treated by radiological embolisation (a minimally invasive, non-surgical procedure) or surgical ligation.
Epididymo-orchitis
A course of antibiotics is the mainstay of treatment. Pain relief and scrotal support help during recovery. Most men recover fully with prompt treatment; a follow-up ultrasound is arranged to confirm resolution.
Testicular torsion
Emergency surgical exploration and de-torsion — ideally within 4–6 hours of symptom onset to preserve the testicle. Both testicles are fixed (orchidopexy) to prevent recurrence.
Testicular cancer
If testicular cancer is confirmed, patients are referred through our specialist cancer pathway. See our dedicated Testicular Cancer page for full information on staging, orchidectomy, and systemic treatment.
When Cancer Is Suspected
Dedicated Cancer Pathway
If a testicular mass is confirmed on examination or ultrasound, or if clinical suspicion of cancer is raised, you will be referred through our cancer clinic pathway without delay. We offer same-week access to consultant review, tumour markers, and further imaging.
Testicular cancer is highly curable — especially when caught early. Our dedicated page covers everything you need to know: tumour types, staging, orchidectomy, chemotherapy, surveillance, and prognosis.
Testicular CancerMeet your Specialists
Assessment and treatment of testicular symptoms is led by our experienced consultant urologists. Your care will be personally overseen by one of our senior specialists.
Key Takeaways
The large majority of testicular symptoms have a benign cause and are easily managed — but any new lump or change should be assessed without delay. Testicular cancer is the most common cancer in younger men, and early diagnosis leads to excellent outcomes.
Further Reading — BAUS Patient Information
Noticed Something Different?
Early assessment is the best way to understand the cause of testicular symptoms and provide reassurance where appropriate. Book a consultation with one of our specialist urologists today.