What Is a Hydrocele? – Symptoms, Causes & Treatment

By (gynecologist), (embryologist), (embryologist) and (invitra staff).
Last Update: 10/24/2019

Hydrocele consists of the accumulation of anomalous fluid in some area of the body. In the case of testicular hydrocele, the most frequent, the increase in fluid occurs between the scrotal pouch and the vaginal tunic of the testicles.

A distinction is made between bilateral hydrocele, if it occurs simultaneously in both testicles, and unilateral hydrocele, if it occurs in only one of them. In this second assumption, the hydrocele can be right or left.

Types and causes

The testicles are inside a pouch called the scrotum. There, they are immersed in a small amount of liquid that helps make them mobile and less vulnerable to shocks.

We speak of testicular or scrotal hydrocele when the amount of fluid in this area is greater than normal.

There are two main causes of hydrocele that give rise to the two basic types of this pathology: congenital hydrocele and acquired hydrocele.

Congenital hydrocele

Congenital hydrocele is the hydrocele that appears in newborn babies. It is the most common type of testicular hydrocele and is also known as communicating hydrocele.

It occurs when the vaginal tunic of the testicle is not completely closed, so that communication with the peritoneal cavity is preserved and this leads to fluid flowing into the scrotal cavity.

During normal development, the testicles descend through a tube from the abdomen to the scrotum. In this case, hydroceles are formed when this duct fails to close and fluid flows from the abdomen through the open duct and accumulates in the scrotum. For this reason, the testicle looks swollen.

Congenital hydrocele may or may not be accompanied by an inguinal hernia.

Congenital hydrocele is very common in infants, but usually disappears between 18 and 24 months of age. If this is not the case, surgery is required.

Acquired hydrocele

In contrast to the previous type, this is known as non-communicating hydrocele. The main reason for the accumulation of fluid is an inflammation caused by various reasons such as infection, testicular torsion, trauma, epididymitis, tumor, etc.

Surgery on the testicular area, such as vasectomy, varicocele intervention or inguinal hernia, may also be the cause of hydrocele.

Acquired hydrocele occurs in children and adults. It most often appears in men aged 40 and older.

Symptoms and Diagnosis

The clinical manifestations of hydrocele are inflammation or painless swelling of the affected testicle or both testicles, in the case of bilateral hydrocele.

Sometimes, this inflammation can cause pain and redness in the area. However, these symptoms are usually mild and do not prevent daily routines.

The diagnosis of hydrocele should be made by a urologist, who will perform the following tests:

the circulating fluid makes the testicle very soft and not noticeable when touched. When the scrotal pouch is carefully palpated, the doctor will perceive the swelling, but that the testicle has a normal volume inside the scrotum. Also, if there is a variation in the amount of fluid, it is usually due to an inguinal hernia.
Transillumination of the scrotum
is a diagnostic test that involves applying a light source behind the scrotal pouch to illuminate it. When there is a testicular hydrocele, the scrotum lights up because it is filled with clear fluid.
is used to confirm the diagnosis and to check that there is no testicular tumor.


Hydrocele is usually not dangerous and is only treated when it causes great discomfort, embarrassment, or when the testicles become so large that they compromise blood supply.

A simple hydrocele usually disappears without treatment. However, there are cases where intervention is needed.

In the next section, we are going to comment on the two operations currently used to eliminate hydrocele.


It is an ambulatory surgery of low complexity and with excellent results. The only handicap is that it requires general or epidural anesthesia.

Broadly speaking, surgery involves making a slight incision in the scrotum or lower abdomen, removing excess fluid through it, and removing some of the tissue to prevent it from filling up again.

The complications that can arise from operating the hydrocele with the hydrocelectomy technique are the following:

  • Blood clots
  • Infection
  • Injury to the scrotal tissue or structures

Testicular aspiration

The other treatment option is to remove fluid from the scrotum with a needle, which is known as testicular aspiration.

This aspiration is usually combined with sclerotherapy, which involves injecting sclerosing drugs (which harden or thicken) to close the opening. The benefit of using this technique is that it helps prevent further accumulation of fluid.

The risks associated with aspiration and sclerotherapy are as follows:

  • Fibrosis
  • Infection
  • Mild or moderate pain in the scrotal area
  • Return of the hydrocele

Ultimately, because of the high risk of infection and the high likelihood that the hydrocele will come back, surgery is usually preferred. Aspiration may be a good alternative for people who have certain surgical risks.

In addition, hydroceles that appear with an inguinal hernia should be surgically repaired as quickly as possible and a hernioplasty should be performed.

Hydrocele and fertility

Hydrocele is not a direct cause of infertility, nor does it usually drastically affect a man's reproductive capacity.

In spite of this, there are cases of hydrocele in which other factors that do influence fertility are compromised, such as an infection.

Therefore, hydrocele could indirectly hinder pregnancy and, in these cases, the option of surgery should be considered.

FAQs from users

I have hydrocele - will I be sterile?

By Esther Marbán Bermejo M.D. (gynecologist).

Hydrocele is the accumulation of fluid between one of the layers of the testicle (vaginal tunic) and the scrotum of one or both testicles. It can be congenital (affects babies at birth) or acquired, i.e. secondary to infections, trauma, tumors, surgeries on the testicle, etc.

In most cases the hydrocele is presented as an inflammation of the testicle, not painful or causing mild discomfort. In itself, it is not a cause of sterility but certain cases, such as those caused by an infection, can reduce the reproductive capacity.

What is spermatic cord hydrocele?

By Zaira Salvador B.Sc., M.Sc. (embryologist).

Spermatic cord hydrocele, also known as cord cyst, is a type of hydrocele in which fluid accumulation occurs along the spermatic cord, i.e., in the upper part of the scrotum.

In addition, there are two other subtypes: funicular hydrocele and cystic hydrocele, depending on whether or not the accumulated fluid communicates with the peritoneum.

Are varicocele, spermatocele and hydrocele the same things?

By Zaira Salvador B.Sc., M.Sc. (embryologist).

No, all three concepts refer to testicular pathologies but they are not the same.

Varicocele refers to inflammation and enlargement of the veins that drain the testicle and the hydrocele indicates the accumulation of fluid in the scrotal pouch. Spermatocele is a benign cyst that forms in the epididymis.

How long after the hydrocele procedure can I have sex?

By Zaira Salvador B.Sc., M.Sc. (embryologist).

This is something that varies between patients, because depending on the size of the hydrocele, the existence or not of complications, the speed of healing, etc. the postoperative will be more or less long.

In any case, it does not usually last longer than 2-3 weeks.

Suggested for you

In addition to hydrocele, there are other pathologies that affect testicular function and can affect infertility. If you want to know more about this topic, we recommend you read the following post: Male infertility due to testicular factor.

If you're interested in the tests that are used to evaluate male fertility, don't miss this article: What are male fertility tests?

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Authors and contributors

 Esther Marbán Bermejo
Esther Marbán Bermejo
Bachelor's Degree in Medicine from the Alcalá University of Madrid. Specialist in Obstetrics & Gynecologist after being a resident doctor at Hospital General Universitario Gregorio Marañón of Madrid. Several years of experience as expert OB/GYN in the field of Reproductive Medicine. More information about Esther Marbán Bermejo
License: 282859737
 Neus Ferrando Gilabert
Neus Ferrando Gilabert
B.Sc., M.Sc.
Bachelor's Degree in Biology from the University of Valencia (UV). Postgraduate Course in Biotechnology of Human Assisted Reproduction from the Miguel Hernández University of Elche (UMH). Experience managing Embryology and Andrology Labs at Centro Médico Manzanera (Logroño, Spain). More information about Neus Ferrando Gilabert
 Zaira Salvador
Zaira Salvador
B.Sc., M.Sc.
Bachelor's Degree in Biotechnology from the Technical University of Valencia (UPV). Biotechnology Degree from the National University of Ireland en Galway (NUIG) and embryologist specializing in Assisted Reproduction, with a Master's Degree in Biotechnology of Human Reproduction from the University of Valencia (UV) and the Valencian Infertility Institute (IVI) More information about Zaira Salvador
License: 3185-CV
Adapted into english by:
 Romina Packan
Romina Packan
inviTRA Staff
Editor and translator for the English and German edition of inviTRA. More information about Romina Packan

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