Hydrocele: Causes, Symptoms, Diagnosis, and Treatment — Symptoms, Causes & Treatment

A hydrocele is a painless collection of fluid around one or both testicles, causing the scrotum to swell. While common in newborns and often resolving on its own, adult hydroceles may require medical evaluation to rule out other conditions and can be treated surgically if they cause discomfort. Sudden pain is a medical emergency.

Hydrocele: Causes, Symptoms, Diagnosis, and Treatment A hydrocele is a common medical condition characterized by a collection of fluid around the testicle, leading to swelling in the scrotum. This fluid-filled sac is typically benign and often painless, though it can cause discomfort or a feeling of heaviness. While hydroceles can occur at any age, they are particularly common in newborn infants and older men. Key Symptoms Painless swelling in one or both testicles. A feeling of heaviness or fullness in the scrotum. Increased scrotal size, which may fluctuate throughout the day. Discomfort or mild pain, especially if the hydrocele is large. Common Causes or Risk Factors In infants, hydroceles often form before birth when the opening between the abdomen and the scrotum, which normally closes, remains open, allowing fluid to pass into the scrotum. In adults, hydroceles can develop due to: Inflammation or infection within the scrotum (e.g., epididymitis, orchitis). Injury or trauma to the testicles or groin area. Underlying medical conditions, such as certain cancers or heart failure (though less common). Diagnosis Diagnosis typically involves a physical examination where a doctor will check for tenderness and transillumination (shining a light through the scrotum to see if the fluid-filled sac glows). An ultrasound may also be performed to confirm the diagnosis, rule out other conditions like a hernia or testicular tumor, and assess the size of the hydrocele. Treatment For infants, hydroceles often resolve on their own within the first year of life. In adults, if the hydrocele is small, painless, and not causing any issues, treatment may not be necessary. However, if it causes discomfort, pain, or significantly increases in size, treatment options include: Aspiration: Fluid is drained from the hydrocele using a needle, though recurrence is common. Hydrocelectomy: A surgical procedure to remove the hydrocele sac, which is the most effective long-term solution. When to See a Doctor It's important to consult a doctor if you notice any scrotal swelling, pain, or discomfort. While many hydroceles are harmless, these symptoms can also indicate more serious conditions that require prompt medical attention. Early diagnosis and appropriate management are crucial for optimal outcomes.

Early symptoms

Painless swelling in the scrotum
A feeling of heaviness
Swelling that may change size throughout the day

Severe symptoms — seek medical care

Sudden, severe pain in the scrotum
Rapid increase in swelling
Redness or warmth of the scrotal skin
Fever accompanying the swelling

Common causes

Patent processus vaginalis (in newborns)
Inflammation or infection (epididymitis/orchitis)
Injury or trauma to the scrotum
Complication from surgery (hernia repair, varicocelectomy)
Blockage in the spermatic cord

Frequently Asked Questions

Is a hydrocele dangerous or serious?

In most cases, a hydrocele itself is not dangerous. It is a benign (non-cancerous) collection of fluid and does not turn into cancer. However, it is essential to have any scrotal swelling evaluated by a doctor to confirm the diagnosis. This is because, rarely, a more serious condition like a testicular tumor or an inguinal hernia can cause similar symptoms [1]. The primary concerns with a large hydrocele are discomfort, a feeling of heaviness, and cosmetic appearance. A hydrocele associated with sudden pain is a medical emergency, as it could signal testicular torsion, which requires immediate surgery to save the testicle.

Can a hydrocele be cured or will it go away on its own?

Whether a hydrocele resolves on its own depends on the type and the patient's age. In newborn infants, congenital communicating hydroceles very often disappear within the first year of life as the connecting channel to the abdomen (processus vaginalis) closes naturally [2]. For adults with non-communicating hydroceles, spontaneous resolution is uncommon. While small, asymptomatic hydroceles can be safely monitored ('watchful waiting'), they typically do not go away. The only definitive cure for a persistent or symptomatic hydrocele in an adult is a surgical procedure called a hydrocelectomy.

How long does recovery from hydrocele surgery (hydrocelectomy) take?

Full recovery from a hydrocelectomy typically takes about 2 to 4 weeks, though some minor swelling and tenderness can persist for longer. Most patients can return to a desk job and light activities within a week. Strenuous activities, heavy lifting, and sexual activity should be avoided for at least 2 to 4 weeks, or as advised by your surgeon [3]. It is normal to experience significant swelling and bruising in the scrotum after surgery, which gradually subsides over several weeks. Wearing a scrotal support (jockstrap) and using ice packs can help manage swelling and discomfort during the initial recovery period.

Can I exercise with a hydrocele?

Yes, you can typically exercise with a small, asymptomatic hydrocele. General fitness activities like walking, jogging, and swimming are usually fine. However, it's wise to wear supportive underwear or a jockstrap to minimize movement and potential discomfort. You should avoid activities that involve heavy straining or increase intra-abdominal pressure, such as very heavy weightlifting, as this could potentially worsen a communicating hydrocele or an associated hernia. If you experience any pain or increased swelling during or after exercise, you should stop the activity and consult your doctor for guidance.

Is a hydrocele hereditary?

A hydrocele is not considered a directly hereditary condition that is passed down through genes like cystic fibrosis or sickle cell anemia. However, congenital hydroceles in infants are related to the failure of the processus vaginalis to close after birth. The factors leading to this are not fully understood but can be more common in premature infants. For adult-onset hydroceles, the causes are typically related to injury, infection, or inflammation, which are not genetic. Therefore, having a father or brother with a hydrocele does not significantly increase your own risk of developing one.

What foods should I eat or avoid with a hydrocele?

There is no specific diet that can cause, prevent, or treat a hydrocele. The condition is a mechanical issue of fluid imbalance, not a metabolic one. However, maintaining a healthy lifestyle is always beneficial for overall health and can help in recovery from surgery. If your hydrocele is related to an underlying infection like epididymitis, your doctor may recommend drinking plenty of fluids. After a hydrocelectomy, eating a balanced diet rich in protein, vitamins, and minerals can support the healing process. Avoiding foods that cause constipation can also be helpful post-surgery to prevent straining during bowel movements.

Can a hydrocele come back after treatment?

The likelihood of a hydrocele returning depends on the treatment method. After a needle aspiration, recurrence is very common, with rates often exceeding 50% [4]. This is because the sac that produces the fluid is left behind. For this reason, aspiration is often considered a temporary solution. In contrast, the recurrence rate after a surgical hydrocelectomy is very low, typically less than 1-5% [3]. During this procedure, the surgeon removes or alters the fluid-producing sac (tunica vaginalis), providing a permanent solution for the vast majority of patients. Recurrence is rare but possible if a small portion of the sac was missed.

How do I know if the treatment is working?

For non-surgical management, such as watchful waiting in an infant, 'working' means the hydrocele gradually gets smaller and resolves on its own over several months. For an adult with a small hydrocele, successful management means the swelling does not increase in size or become painful. After a hydrocelectomy, the initial sign of success is the immediate absence of the fluid collection, although this will be masked by post-operative swelling. The treatment is considered successful when this surgical swelling completely resolves over the following weeks and months, and the scrotum returns to a normal size without the fluid re-accumulating.

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Educational information only. Always consult a qualified healthcare professional for diagnosis or treatment.