The testes are arguably the most important organs in male reproductive health — responsible for producing both sperm and testosterone, the two pillars of male fertility. Yet many men remain unaware of the range of testicular conditions that can develop silently, cause chronic discomfort, and — if left untreated — meaningfully impact their ability to father children.
At Care and Cure Infertility Centre, Hyderabad, we evaluate testicular health as a central component of every male fertility workup. Conditions such as hydrocele and epididymitis are far more common than most men realise — and understanding their symptoms, causes, and treatment options is the first step toward protecting both your health and your fertility.
This comprehensive guide explains the most important non-cancerous testicular conditions, their link to male infertility, and what modern medicine offers in terms of diagnosis and treatment.
Why Testicular Health Matters for Fertility
The testes perform two inseparable functions: spermatogenesis (the production of sperm) and steroidogenesis (the production of testosterone). Both are exquisitely sensitive to their local environment — temperature, blood supply, hormonal signalling, and the absence of infection or inflammation.
Any condition that disrupts testicular blood flow, raises local temperature, introduces infection, or causes structural damage threatens both functions. The result can be reduced sperm count, impaired motility, abnormal morphology, elevated DNA fragmentation — or in severe cases, permanent damage to sperm-producing tissue.
Early diagnosis and treatment of testicular conditions is therefore not just about resolving discomfort — it is about preserving and protecting future fertility.
Hydrocele: When Fluid Surrounds the Testicle
What Is a Hydrocele?
A hydrocele is an accumulation of fluid in the space surrounding the testicle — the tunica vaginalis, a double-layered membrane that encloses the testis. Under normal circumstances, this space contains only a small amount of lubricating fluid. When fluid production exceeds absorption, or when fluid drainage is impaired, it accumulates — creating a smooth, typically painless swelling of the scrotum.
Hydroceles are the most common cause of painless scrotal swelling in adult men and are found in approximately 1% of adult males.
Types of Hydrocele
Primary (Idiopathic) Hydrocele: The most common type in adults. No identifiable underlying cause — develops gradually, usually affects one side, and is typically painless. The imbalance between fluid secretion and absorption appears to occur spontaneously.
Secondary (Reactive) Hydrocele: Develops as a reaction to an underlying testicular condition — infection (epididymo-orchitis), testicular torsion, trauma, varicocele, or — importantly — testicular tumour. Any new scrotal swelling must be properly evaluated to exclude malignancy before assuming a benign cause.
Communicating Hydrocele: More common in infants and young men — a persistent opening between the peritoneal cavity (abdomen) and the tunica vaginalis allows peritoneal fluid to flow in and out of the scrotum. May change in size throughout the day, often appearing larger after physical activity.
Symptoms of Hydrocele
- Smooth, non-tender scrotal swelling — typically on one side, though bilateral hydroceles occur
- Heaviness or dragging discomfort in the affected side — particularly noticeable after prolonged standing or physical activity
- Transillumination — when a light source is held against the swelling in a darkened room, it glows red (fluid transmits light, unlike solid masses)
- In secondary hydrocele — accompanying pain, tenderness, fever, or rapid onset may indicate an underlying infection or torsion requiring urgent evaluation
Does Hydrocele Affect Fertility?
This is the question most men with a hydrocele want answered. The relationship is nuanced:
- A small, primary hydrocele in isolation typically has no significant impact on sperm production or fertility
- Large hydroceles can raise scrotal temperature by compressing the testis and insulating it with the surrounding fluid mass — and sustained temperature elevation impairs spermatogenesis
- Secondary hydroceles associated with epididymitis, orchitis, or varicocele do affect fertility — through the underlying condition rather than the fluid itself
- Hydroceles associated with testicular atrophy (shrinkage of the testicle due to impaired blood supply or past infection) are a more serious concern for sperm production
A semen analysis and scrotal Doppler ultrasound will clarify whether a hydrocele is affecting testicular function and whether treatment is warranted from a fertility perspective.
Treatment of Hydrocele
Watchful Waiting: For small, asymptomatic, primary hydroceles with no impact on semen parameters — careful monitoring without intervention is appropriate. Many small hydroceles remain stable indefinitely.
Hydrocelectomy (Surgical Repair): The definitive and most effective treatment. The fluid-filled sac is surgically excised or everted (turned inside out) through a small scrotal incision under general or spinal anaesthesia. Day surgery in most cases. Recovery takes 2–3 weeks. Success rates are excellent with very low recurrence.
Aspiration and Sclerotherapy: The fluid is drained using a needle, and a sclerosing agent is injected to prevent re-accumulation. A less invasive alternative but with significantly higher recurrence rates than surgical repair. Suitable for men unfit for surgery.
Epididymitis: Infection and Inflammation Behind the Testis
What Is Epididymitis?
The epididymis is a tightly coiled tube — approximately 6 metres long when uncoiled — that sits behind each testicle. It serves as the maturation and storage site for sperm after they leave the testis. Sperm spend approximately 2–3 weeks in the epididymis, during which they acquire their swimming ability and fertilising capacity.
Epididymitis is inflammation of the epididymis — most commonly caused by bacterial infection. When the inflammation extends to involve the testicle itself, the condition is called epididymo-orchitis.
Epididymitis is the most common cause of acute scrotal pain in adult men and is a condition that demands prompt medical attention — both for symptom relief and to prevent lasting fertility damage.
Causes of Epididymitis
In Men Under 35: The most common causes are sexually transmitted infections (STIs) — particularly Chlamydia trachomatis and Neisseria gonorrhoeae. Chlamydial epididymitis is often insidious — the initial urethral infection may be asymptomatic, and epididymitis is the first sign that an STI is present.
In Men Over 35: Urinary tract pathogens become more dominant — particularly Escherichia coli (E. coli) — often in the context of urinary tract infections, prostate enlargement, or urological procedures.
Other Causes:
- Tuberculosis (TB): A significant cause of epididymitis in India — TB can infect the epididymis through blood-borne spread, causing chronic granulomatous inflammation and severe scarring
- Viral orchitis: Mumps virus, if contracted after puberty, causes orchitis (testicular inflammation) in approximately 30% of cases — often with devastating consequences for sperm production
- Chemical (non-infectious) epididymitis: Caused by reflux of sterile urine into the epididymis — common in men who do heavy lifting or strain intensely
- Autoimmune: Occasionally linked to systemic autoimmune conditions
Symptoms of Epididymitis
- Acute scrotal pain — typically unilateral, often severe, developing over hours to days
- Swelling, warmth, and redness of the affected side of the scrotum
- Tenderness specifically behind the testicle — distinguishing epididymitis from testicular torsion on physical examination (Prehn’s sign)
- Fever — particularly in bacterial epididymitis
- Urethral discharge — in STI-related cases
- Burning or pain on urination — reflecting the associated urethritis or UTI
- Elevated, tender epididymis — palpable as a firm, tender ridge behind the testicle
Epididymitis and Male Fertility: A Serious Concern
Epididymitis has potentially serious consequences for male fertility — and this is consistently underappreciated:
1. Epididymal Scarring and Obstruction: Bacterial infection triggers an intense inflammatory response in the delicate tubules of the epididymis. As the infection resolves, scar tissue (fibrosis) can narrow or completely block the epididymal lumen — preventing sperm from passing through. Bilateral epididymal obstruction is a well-recognised cause of obstructive azoospermia (zero sperm in the ejaculate despite normal sperm production in the testes).
2. Anti-Sperm Antibodies: Infection disrupts the blood-testis barrier — the protective immunological shield that normally prevents the immune system from recognising sperm as foreign. Once breached, the immune system produces anti-sperm antibodies (ASA) that coat sperm, causing agglutination (clumping), impaired motility, and reduced fertilising capacity. Anti-sperm antibody positivity is found in up to 70% of men following epididymitis.
3. Direct Sperm DNA Damage: The inflammatory microenvironment of active epididymitis generates enormous quantities of reactive oxygen species that directly damage developing sperm — causing elevated DNA fragmentation that persists even after the infection resolves.
4. Testicular Atrophy: In severe epididymo-orchitis — particularly mumps orchitis — direct damage to the sperm-producing Sertoli and Leydig cells can cause permanent testicular atrophy and dramatically reduced sperm production.
Diagnosing Epididymitis
At Care and Cure Infertility Centre, Hyderabad, our evaluation includes:
- Scrotal Doppler Ultrasound — the gold standard imaging tool; shows an enlarged, inflamed epididymis with increased blood flow (distinguishing it from torsion, which shows absent flow); identifies associated hydrocele, abscess, or testicular involvement
- Urethral swab and urine culture — identifies the causative organism and guides antibiotic selection
- STI screening — NAAT (nucleic acid amplification test) for Chlamydia and Gonorrhoea
- Semen culture — identifies bacterial contamination of semen in recurrent cases
- Tuberculosis workup — Mantoux test, chest X-ray, semen AFB culture where TB is suspected
- Complete blood count and CRP — markers of systemic infection
- Post-treatment semen analysis — essential to assess whether fertility has been affected after the infection resolves
Treatment of Epididymitis
Antibiotic Therapy: The cornerstone of treatment. Antibiotic selection is based on the likely causative organism:
- STI-related (under 35): Ceftriaxone injection + Doxycycline 100 mg twice daily for 10–14 days (covers both Chlamydia and Gonorrhoea)
- Enteric organism-related (over 35): Levofloxacin or Ofloxacin for 10–14 days
- TB epididymitis: Full anti-tubercular therapy (ATT) for 6–9 months
Supportive Measures:
- Scrotal elevation and support (scrotal support/jockstrap) — significantly reduces pain
- NSAIDs (ibuprofen, diclofenac) — for pain and anti-inflammatory effect
- Ice packs to the scrotum in the acute phase
- Sexual rest until symptoms resolve; partner notification and treatment in STI cases
Surgical Intervention:
- Epididymal abscess: Surgical drainage required if antibiotic therapy fails
- Epididymo-orchitis with necrosis: Orchiectomy (removal of the testicle) in severe cases with non-viable testicular tissue
Post-Infection Fertility Evaluation: A semen analysis should be performed 3–6 months after completing treatment — when the acute effects of infection have subsided and any lasting structural damage can be accurately assessed. If obstructive azoospermia or significant sperm parameter deterioration is found, surgical options (vasography, epididymal reconstruction, or sperm retrieval for ICSI) can be explored.
Other Important Testicular Conditions Affecting Fertility
Orchitis (Testicular Inflammation)
Inflammation of the testis itself — most commonly occurring as an extension of epididymitis (epididymo-orchitis), or as a consequence of mumps virus in post-pubertal men. Mumps orchitis occurs in 20–30% of post-pubertal males with mumps infection, causing direct destruction of seminiferous tubules. Up to 30% of affected testes show some degree of permanent atrophy. Bilateral mumps orchitis can cause severe oligospermia or azoospermia.
Prevention through MMR vaccination is the most effective strategy. Men with a history of mumps orchitis should have a baseline semen analysis performed regardless of whether they are actively trying to conceive.
Testicular Torsion
Testicular torsion — twisting of the spermatic cord that cuts off blood supply to the testis — is a urological emergency requiring surgical intervention within 6 hours to preserve the testicle. Beyond 6 hours, the probability of testicular salvage drops dramatically, and permanent damage to sperm-producing tissue is likely. Men who have experienced torsion — even if the testicle was saved — should have fertility evaluation, as the ischaemic damage can impair spermatogenesis and trigger anti-sperm antibody formation.
Testicular Microlithiasis
A condition where tiny calcium deposits form within the testicular tubules, visible on ultrasound as bright echogenic foci. Mild testicular microlithiasis in isolation is generally benign, but extensive microlithiasis has been associated with reduced sperm production and — in some studies — a slightly increased risk of testicular germ cell tumours. Annual ultrasound monitoring is recommended for men with extensive microlithiasis.
When Should You See a Specialist?
Seek prompt medical evaluation if you experience:
- Any new scrotal swelling — to exclude testicular tumour before assuming a benign cause
- Acute scrotal pain — testicular torsion must be urgently excluded; it is a time-critical emergency
- Chronic testicular discomfort or heaviness — even without acute pain, persistent symptoms warrant evaluation
- Difficulty conceiving after 12 months of trying — a scrotal ultrasound is part of every male fertility workup
- History of STI, UTI, mumps orchitis, or testicular torsion — prior events with potential lasting fertility impact need assessment
Final Thoughts
Testicular health is male fertility health. Conditions like hydrocele and epididymitis are common, often underdiagnosed, and — when left untreated — can cause lasting damage to the very structures responsible for producing and maturing healthy sperm. The encouraging reality is that most testicular conditions are treatable, particularly when identified early.
A scrotal Doppler ultrasound and semen analysis together provide an extraordinarily detailed picture of testicular health and fertility status. These two investigations, reviewed by an experienced fertility specialist, can detect and quantify the impact of almost any testicular condition on male reproductive function.