Seroma – Definition, Causes, Symptoms and Treatment

Troubled at the sight of the tumor-like swelling on your skin? You may be having a Seroma, a collection of lymph tissues. Go through our article on Seroma to know more about this unique medical condition.

Seroma Definition

Medical practitioners generally define Seroma as a post-injury or post-operative condition. The condition is characterized by a bump or swelling formed by a deposit of lymph, that usually arises after a trauma or a surgical operation. The Seroma lumps are filled with a yellowish or white fluid that can be seen around fresh cuts and blisters.

Seromas are generally an after-effect of an injury to the body or some other condition. They are not a threatening condition by themselves, even though they require proper medical care for their treatment.

Causes of Seroma

A lot of factors can give rise to Seroma formation. These include:


Mastectomy or surgical breast removal often leads to this abnormality. The operation is usually carried out to get rid of a malignant tumor in the breast. Seroma after breast surgery happens if the blood vessels of an area near the operated region accidentally suffer damage during surgery. The rupture of the blood cells gives rise to an inflammatory response in the body which releases blood plasma. The blood plasma is a colorless watery liquid of the blood. It usually suspends blood cells like leukocytes, thrombocytes and erythrocytes. This fluid, also known as serous liquid as it contains serum produced by the serous membranes of the body, gets accumulated as lumps under the skin. Seroma after mastectomy is a common condition.

Abdominal Surgery

Many people suffer from Seroma after tummy tuck operation or any other major surgery in the abdomen. This arises if the operated area is not properly treated with antiseptics and sutures. If experienced hands are not involved in performing operation for tummy tuck Seroma may occur.

Plastic Surgery

Seromas may also be seen after an imperfectly conducted plastic surgery on the face. Seromas are usually seen to arise in the neck after facial surgeries. Postoperative Seromas are quite common.

Hernia Surgery

Seroma after Hernia Surgery is also seen in many people. An improper surgery can lead to a development of seroma somewhere near the herniated region.


Seroma after hysterectomy also occurs in a few cases. This happens when the surgical removal of uterus in women is not done properly.

Ceaserian Section

Seroma after C section is also seen in some cases. If the surgery is not done carefully, it may result in Seroma in women who have a Caesarian delivery.


An injury to the body gives rise to similar conditions as in Seroma after surgery. If the body receives a trauma or injury, there is an immediate swelling in the affected region. Similar to a wound Seroma shows an inflammation. The inflammation, however, is generally a result of accumulation of serous fluid. It may also happen due to a collection of dead cells in the region.

Partial-Breast Radiation Therapy

Partial-breast radiation therapy has also recently been found to be a reason behind this condition.

Seroma Symptoms

seroma pictures
Picture 1 – Seroma
Source – tqn

Seroma is marked by several symptoms which are generally external in nature and visible to the naked eye. These include:


As aforesaid, Seromas are characterized by swelling or inflammation under the skin. These are formed due to the accumulation of serous liquid as a lump under particular parts of the skin.

Movement of Fluid

Touching the affected area usually causes a movement of the serum containing fluid beneath the skin.

Inflammation in Surrounding Regions

A seroma can appear in an operated area as well as in areas around it. In case of a mastectomy, Seromas can appear around the shoulder or even in the armpit.


In some cases, a rupture in the skin area due to an injury or operation may also result in a local infection. In cancer patients, development of an infection can cause a delay in starting chemotherapy.


A calcification or hardening of the affected area may also occur in cases where the Seroma is allowed to heal by itself.

Seroma Hematoma Confusion

Seroma is often confused with hematoma. Both are characterized by swellings though the content of each inflammation is different. Seromas contain serous fluid or serum containing blood plasma whereas Hematomas are localized swellings filled with red blood cells. However, both of them are formed due to a rupture in the blood vessel.

Seroma Treatment

The treatment of Seroma is usually done with draining the swollen area. If the inflammation is large enough to cause discomfort and problems in carrying out daily activities, doctors normally recommend surgical drainage. An expert physician punctures the region with a surgical needle to draw out the liquid. This is done to avoid the development of any infection in later stages.

The accumulation of blood plasma is persistent in some patients. In such post operative Seroma cases, drainage has to be carried out for multiple times to empty the seroma. If that does not treat the condition, a patient may need another surgery for complete treatment for Seroma.

In some cases, doctors carry out tests to check if the swollen area contains blood, pus or any other fluid other than serous liquid. The presence of such elements can be a cause for concern and the area may need to be treated differently in such situations.

If the swelling is not too large or possess no abnormalities, doctors may recommend leaving it as it is to heal naturally. Complete healing of seromas without treatments varies from person to person. It may go away in a month or even take an entire year to heal completely.

drainage Seroma
Picture 2 – Seroma Drainage
Source – nucleusinc

There are no oral pills available for the cure of this condition. Whether in abdominal Seroma treatment or any other surgery or injury, Seroma drainage is the only method that is relied on.

Seroma is not a fatal condition in itself. However a very large Seroma needs medical treatment. In any case, leaving it untreated is not advised. As aforesaid, in many people with Seroma infection may develop in later stages. If you are suffering from cancer an infected Seroma can lead to postponement in starting chemotherapy. So it is better to seek medical attention now to avoid serious Seroma complications in future.



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