When fluid collects in the sac surrounding the testicle, causing swelling in the scrotum, treatment decisions depend on whether the hydrocele causes discomfort, how large it becomes, and whether it resolves naturally or persists over time.

Managing Hydrocele: From Watchful Waiting to Surgical Solutions

A hydrocele represents a painless buildup of watery fluid around one or both testicles, leading to swelling in the scrotum, which is the pouch of skin that holds the testicles. The primary goal of treatment is to relieve discomfort, reduce swelling, and prevent potential complications that might arise if the condition persists or worsens. Treatment approaches vary significantly depending on the patient’s age, the size of the hydrocele, and whether symptoms are present.^[1]

The condition is especially common in newborn infants, affecting about one in ten babies. In these cases, the hydrocele often disappears on its own within the first year or two of life as the body naturally absorbs the excess fluid. However, hydroceles can also develop later in life due to injury, infection, or inflammation of the scrotum or surrounding structures. In older children and adults, hydroceles may require more active intervention if they persist, grow larger, or cause discomfort.^[2]

Medical societies and clinical guidelines emphasize that not every hydrocele requires immediate treatment. The decision to intervene depends on multiple factors including patient age, symptom severity, and the impact on daily activities. Standard treatments range from simple observation to surgical removal, while research continues into minimally invasive approaches that might offer alternatives to traditional surgery.^[9]

Standard Treatment Approaches for Hydrocele

The cornerstone of standard hydrocele treatment is a careful assessment to determine whether active intervention is necessary. In newborns and infants, healthcare providers typically recommend a period of observation, as the majority of infant hydroceles resolve without any treatment by the time the child reaches one year of age. This watchful waiting approach avoids unnecessary procedures while the child’s body naturally reabsorbs the fluid.^[5]

For adults with small, painless hydroceles, observation remains a valid treatment option. Many adult hydroceles do not change in size or cause symptoms, and therefore do not require any medical intervention. However, hydroceles in men under 65 may resolve spontaneously, while those in older men typically do not disappear on their own. During the observation period, patients are monitored for any changes in size or the development of symptoms.^[7]

When a hydrocele persists beyond the first year or two in children, causes discomfort, continues to grow, or affects quality of life in adults, surgical removal becomes the recommended treatment. The procedure, called hydrocelectomy, involves making an incision either in the scrotum or the lower abdominal area to drain the fluid and remove the fluid-filled sac. This prevents the hydrocele from returning. The surgery is typically performed as an outpatient procedure, meaning patients can often go home the same day.^[9]

During a hydrocelectomy, patients receive anesthesia to prevent pain. One type of anesthesia induces a sleep-like state, while other types numb only the affected area. The surgeon makes a careful incision to access the hydrocele sac, drains the accumulated fluid, and then removes or repairs the sac to prevent fluid from collecting again. In some cases, if a hydrocele is discovered during surgery for an inguinal hernia, which is a weakness in the abdominal wall that allows tissue to protrude, the surgeon may remove the hydrocele even if it was not causing symptoms.^[16]

An alternative to surgery is aspiration, a procedure where fluid is removed from the hydrocele using a needle. However, this approach has significant limitations. Hydroceles that are aspirated frequently return, often within weeks or months, because the sac that produces the fluid remains intact. Additionally, aspiration carries a risk of infection and is generally reserved for patients who cannot safely undergo surgery due to other serious health conditions or advanced age.^[7]

Recovery from hydrocelectomy typically takes several weeks. Immediately after surgery, patients may experience groin pain and swelling or bruising in the scrotal area. These symptoms usually improve within two to three weeks. A drainage tube and bulky bandage may be needed for a few days following the procedure to manage fluid buildup and support healing. Most people can return to work or school within four to seven days, though strenuous activities, heavy lifting, and vigorous exercise should be avoided for two to four weeks.^[15]

Side effects from hydrocelectomy are generally mild but can include pain at the incision site, temporary swelling, bruising, and a feeling of heaviness in the scrotum. Some patients may develop an infection at the surgical site, which would require antibiotic treatment. Rarely, the hydrocele can recur even after surgery, necessitating a follow-up examination and potentially additional treatment.^[15]

Innovative Treatments Being Studied in Clinical Trials

While traditional surgical hydrocelectomy remains the gold standard for persistent or symptomatic hydroceles, researchers are exploring less invasive treatment methods that could offer patients quicker recovery times, reduced complications, and improved cosmetic outcomes. These innovative approaches are being tested primarily in adult patients and represent a shift toward minimally invasive techniques in urological surgery.^[10]

One promising area of research involves individualized minimally invasive treatments tailored to the specific characteristics of each patient’s hydrocele. A pilot study conducted in China explored different minimally invasive approaches based on factors such as hydrocele volume, patient age, and underlying cause. The study tested various techniques including sclerotherapy and modified surgical approaches that use smaller incisions and specialized instruments. Early results suggested that personalized treatment strategies could achieve good outcomes with less tissue trauma and faster recovery compared to traditional open surgery.^[10]

Sclerotherapy represents another alternative treatment being evaluated in clinical settings. This procedure involves draining the hydrocele fluid with a needle and then injecting a chemical agent, called a sclerosant, into the sac. The sclerosant irritates the lining of the sac, causing it to seal shut and prevent fluid from accumulating again. While sclerotherapy has been used for years, ongoing research aims to identify the most effective sclerosing agents and optimize injection techniques to reduce recurrence rates and minimize side effects such as pain or infection at the injection site.^[11]

Laparoscopic techniques are also being investigated for hydrocele treatment, particularly in cases where the hydrocele is associated with a hernia or when the hydrocele extends into the abdomen. Laparoscopic surgery uses small incisions and a camera-equipped instrument to visualize and treat the hydrocele from inside the abdomen. Studies comparing laparoscopic approaches to traditional open surgery have found similar effectiveness with potentially better cosmetic results due to smaller scars. One study examined laparoscopic percutaneous extraperitoneal closure in pediatric patients and found it to be safe and effective with no recurrences observed during follow-up.^[11]

Researchers are also exploring single-port laparoscopic techniques, which use only one small incision instead of multiple cuts. A modified single-port approach has been tested in children with complicated hydroceles, using specialized needles to manipulate tissue and suture the internal opening. This technique aims to reduce operative time, minimize scarring, and lower the risk of complications while maintaining the same success rate as traditional multi-port laparoscopic surgery. Early results from trials involving several hundred children showed good outcomes with minimal complications.^[11]

These minimally invasive approaches are generally studied in Phase I and Phase II clinical trials. Phase I trials focus primarily on safety, testing whether the new technique causes acceptable levels of side effects and complications in a small group of patients. Phase II trials expand the patient population and begin to evaluate effectiveness, comparing outcomes such as recurrence rates, recovery time, and patient satisfaction against established surgical methods. Some techniques have progressed to Phase III trials, which directly compare the new approach to standard surgical treatment in larger groups of patients to determine whether the innovation offers meaningful advantages.^[10]

The mechanism of action for these innovative treatments varies. Sclerotherapy works by triggering an inflammatory response that causes the sac lining to adhere to itself, eliminating the space where fluid can collect. Laparoscopic techniques achieve the same goal as open surgery—removing or sealing the fluid-producing sac—but through smaller incisions with the aid of magnified visualization. The theoretical advantages include less postoperative pain, shorter hospital stays, faster return to normal activities, and reduced risk of wound complications.^[11]

Preliminary results from clinical trials investigating these minimally invasive methods have been encouraging. Studies report success rates comparable to traditional surgery, with some showing reduced operative times and shorter recovery periods. Patients in these trials have generally reported less postoperative pain and higher satisfaction with the cosmetic appearance of the surgical site. However, researchers emphasize that longer follow-up periods are needed to confirm that these approaches prevent hydrocele recurrence as effectively as standard hydrocelectomy.^[10]

Most of these clinical trials are being conducted at specialized urology centers in countries including China, the United States, and various European nations. Patient eligibility varies by study but generally includes adult men with primary hydroceles that are not associated with tumors or infections. Some pediatric studies focus on children with communicating hydroceles or those with complex presentations requiring surgical intervention. Participants typically undergo thorough screening including physical examination and imaging studies to ensure they meet the study criteria.^[10]

Most common treatment methods

• Observation (Watchful Waiting)
  • Recommended for newborns and infants, as most hydroceles resolve on their own within the first year or two of life
  • Appropriate for adults with small, painless hydroceles that do not affect quality of life
  • Involves regular monitoring to check for changes in size or development of symptoms
  • Avoids unnecessary surgical intervention when the condition is not causing harm
• Surgical Hydrocelectomy
  • The standard surgical procedure for persistent or symptomatic hydroceles
  • Involves making an incision in the scrotum or lower abdomen to drain fluid and remove the sac
  • Typically performed as outpatient surgery with same-day discharge
  • Requires anesthesia and recovery period of two to four weeks
  • Prevents recurrence by removing the fluid-producing sac
• Needle Aspiration
  • Involves draining fluid from the hydrocele using a needle
  • Reserved for patients who cannot safely undergo surgery due to health conditions
  • High rate of recurrence since the sac remains intact
  • Carries risk of infection at the puncture site
  • Generally not recommended as primary treatment
• Minimally Invasive Techniques (Clinical Trials)
  • Laparoscopic surgery using small incisions and camera-guided instruments
  • Single-port laparoscopic approaches with only one small incision
  • Sclerotherapy involving injection of chemicals to seal the hydrocele sac
  • Individualized treatment strategies based on patient characteristics
  • Being studied for potentially faster recovery and fewer complications