Hydrocele Surgery — How It Works, Benefits & Recovery — Procedure Guide, Recovery & Risks | MyMedicPlus

A hydrocele is a benign accumulation of serous fluid within the tunica vaginalis — the two-layered protective membrane that surrounds the testis — causing painless swelling of the scrotum. Primary (idiopathic) hydroceles in adults have no identified underlying cause and reflect an imbalance between fluid production and reabsorption by the peritoneal-derived mesothelial lining of the tunica. Secondary hydroceles arise in response to an adjacent pathological process: epididymitis, orchitis, torsion, trauma, or — importantly — testicular tumour. In children, a communicating hydrocele results from a patent processus vaginalis (a persistent embryological channel between the peritoneal cavity and the scrotum) that allows peritoneal fluid to flow freely into the tunica; this type often reduces spontaneously when lying flat. Hydrocelectomy — the surgical correction of hydrocele — is performed when the hydrocele causes discomfort from size or weight, when it is cosmetically distressing to the patient, when it is secondary to an underlying pathology requiring exploration, or in children when the communicating hydrocele has persisted beyond 18–24 months of age (the expected window of spontaneous closure of the processus vaginalis). Aspiration of hydrocele fluid is not recommended as a long-term treatment because recurrence is near universal within weeks to months.

Not all hydroceles require surgical treatment. Small, asymptomatic primary hydroceles in adults may be managed expectantly with reassurance once testicular tumour has been excluded by ultrasound. Surgical indications include: large or progressively enlarging hydroceles causing physical discomfort, pressure symptoms, or difficulty with daily activities and sexual function; hydroceles secondary to confirmed benign conditions (epididymitis, trauma) that have not resolved after 3–6 months; a hydrocele in a child over 18–24 months of age where spontaneous closure of the patent processus vaginalis is unlikely (communicating hydrocele confirmed by positional variation in size or transillumination); and cases where a secondary hydrocele coexists with a scrotal mass or testicular abnormality requiring surgical exploration to exclude malignancy, where the hydrocele fluid obscures adequate palpation and ultrasound evaluation of the testis. Pre-operative testicular ultrasound is mandatory in all adult-onset hydroceles to exclude underlying testicular pathology before attributing the hydrocele to a primary aetiology. Contraindications to surgery include active scrotal infection, significant coagulopathy, or medical unfitness for anaesthesia — all of which require pre-operative optimisation.

Hydrocelectomy is performed under general or spinal anaesthesia as a day-case procedure. For adult primary hydroceles, a transverse incision approximately 3–5 cm long is made on the anterior surface of the scrotum. Dissection through the subcutaneous dartos muscle and fascial layers exposes the hydrocele sac (the thickened tunica vaginalis). The sac is opened and the hydrocele fluid is aspirated and evacuated. At this point, the testis and epididymis are inspected under direct vision to confirm or exclude associated pathology. The key step is preventing fluid re-accumulation by surgically ablating the tunica vaginalis secreting surface. Two main techniques are used: the Lord's procedure (plication) folds and sutures the excess tunica vaginalis behind the testis (particularly suitable for smaller hydroceles; less haematoma risk but higher recurrence rate of 5–10%). The Jaboulay procedure (eversion) turns the sac inside out and sutures the reflected edges behind the epididymis (preferred for large hydroceles; recurrence rate below 2% with complete eversion; slightly higher haematoma risk). For communicating hydroceles in children, an inguinal approach is used instead of a scrotal incision: the patent processus vaginalis is identified at the internal inguinal ring and ligated at that level, allowing the hydrocele fluid in the scrotum to reabsorb naturally. A closed-suction drain may be placed in the scrotum and removed the following day.

Hydrocelectomy provides definitive resolution of scrotal swelling with excellent long-term outcomes in the majority of patients. The primary benefit is permanent elimination of scrotal swelling and its associated physical and psychological discomfort — patients frequently report significant improvement in sexual self-confidence, activity tolerance, and quality of life following surgery. Recurrence rates after complete excision of the tunica vaginalis (Jaboulay procedure) are less than 2%, making it far superior to aspiration (which has near-universal recurrence within weeks to months) as a definitive treatment. In children with communicating hydroceles, inguinal ligation of the patent processus vaginalis achieves cure rates approaching 100% — simultaneous repair of an associated inguinal hernia (which coexists in up to 15% of communicating hydrocele cases) adds additional surgical benefit in a single anaesthetic. Direct intraoperative inspection of the testis during hydrocelectomy allows simultaneous diagnosis and management of any underlying pathology identified — including early epididymal cysts, micro-orchidism, or — in rare cases — testicular tumour that prompted the secondary hydrocele. Patient satisfaction rates after hydrocelectomy exceed 90% in published series, with the majority reporting complete resolution of symptoms and no regret regarding surgery.

Hydrocele surgery is generally safe with low complication rates in experienced hands. Haematoma formation is the most common surgical complication, occurring in 3–10% of cases — more frequent with the Jaboulay excision procedure than with Lord's plication — and usually resolves with conservative management (scrotal support, analgesia), though evacuation is occasionally required. Wound infection occurs in fewer than 2% of cases. Post-operative scrotal oedema and bruising are expected and can be impressive in extent even without complication — patients should be warned that the scrotum often looks worse before it looks better in the first 1–2 weeks. Recurrence of hydrocele after Lord's plication occurs in 5–10%; after complete excision the recurrence rate is below 2%. Injury to the testicular blood supply (testicular artery or its branches) is rare but serious — it can cause testicular atrophy (ischaemic orchidopathy) and occurs in less than 1% of cases performed by experienced surgeons. Epididymal injury causing scarring and obstructive azoospermia is a rare but relevant risk for men of reproductive age, particularly if extensive epididymal dissection is required. Suture granuloma or chronic wound discomfort is occasionally reported but usually resolves within weeks. Injury to the vas deferens during the inguinal approach for communicating hydrocele in children is a significant concern; surgical magnification and careful technique minimise this risk.

Most patients are discharged home on the day of surgery, once they have recovered from anaesthesia and achieved adequate pain control with oral analgesia. A scrotal support (athletic support or close-fitting underwear) is worn continuously for 4–6 weeks post-operatively to reduce swelling and provide comfort. Post-operative scrotal swelling and bruising are expected and typically peak on days 2–5 before gradually resolving over 3–4 weeks; the scrotum may feel firm due to haematoma or seroma formation in the first 2 weeks. Showering is permitted after 48 hours; swimming and bathing are avoided until wounds are fully healed (usually 2 weeks). Driving is permitted once the patient is comfortable and not taking opioid analgesia — typically 5–7 days for automatic vehicles. Light activities and desk work can resume in 1–2 weeks. Strenuous exercise, gym training, heavy lifting, and sexual activity are deferred for 4 weeks. Absorbable sutures are used and do not require removal. Patients should seek medical attention for fever above 38°C, increasing rather than decreasing pain, or wound discharge, which may indicate infection or haematoma requiring drainage. Follow-up at 4–6 weeks confirms healing and reviews the outcome.