A swollen abdomen that refuses to go away may be more than the result of overeating or digestive discomfort. In some cases, it can signal a potentially serious medical condition in which fluid gradually accumulates inside the abdominal cavity.
Known medically as ascites, this condition is frequently associated with serious underlying illnesses, particularly liver cirrhosis and heart failure. Although the accumulation of fluid may not immediately threaten a person’s life, leaving it untreated can lead to complications that require urgent medical attention.
What Is Ascites and Why Does It Develop?
Ascites occurs when an abnormal amount of fluid collects inside the peritoneal cavity, the space between the layers of the membrane surrounding the abdominal organs.
The condition is most commonly associated with cirrhosis, a disease in which scar tissue gradually replaces healthy liver tissue and interferes with normal liver function. However, liver disease is not the only possible cause. Heart failure and other serious medical conditions can also contribute to fluid accumulation in the abdomen.
How to Tell the Difference Between Ordinary Bloating and Ascites
Ordinary bloating is commonly associated with digestion, gas or certain foods. It often changes throughout the day and may improve after passing gas or having a bowel movement.
Ascites, on the other hand, generally causes persistent abdominal enlargement. The swelling does not simply disappear after digestion or a change in eating habits because it is caused by fluid accumulating inside the abdomen rather than gas in the digestive system.
In its earliest stages, ascites can be difficult to recognize. Small amounts of fluid may produce few noticeable symptoms, meaning some people may not realize anything is wrong until the accumulation becomes more significant.
As the condition progresses, however, the abdomen can become increasingly swollen and feel unusually heavy or tight.
Warning Signs That Should Not Be Ignored
One of the most noticeable signs of developing ascites is rapid weight gain over a relatively short period. Unlike weight gain caused by changes in diet or lifestyle, this increase can result from fluid accumulating inside the body.
As the abdomen expands, activities that were previously routine, including bending over, may become uncomfortable or painful.
Fluid accumulation may also be accompanied by swelling in the legs and ankles.
Other symptoms can become apparent when the underlying condition involves advanced liver disease. These include jaundice, which causes the skin and whites of the eyes to turn yellow, as well as unusually dark urine and very pale stools.
Why Ascites Can Become Dangerous
One of the most serious is spontaneous bacterial peritonitis, a potentially life-threatening infection that develops when bacteria infect the fluid accumulated inside the abdominal cavity.
The infection can cause abdominal pain and tenderness, fever and nausea, although some patients may experience few obvious symptoms. Without prompt diagnosis and treatment, it can lead to severe complications, including kidney problems and bloodstream infections.
The underlying disease also needs attention, since simply removing the excess fluid does not necessarily resolve the medical problem responsible for its accumulation.
How Doctors Diagnose and Treat Ascites
When ascites is suspected, doctors may recommend imaging examinations to determine whether fluid is present and how much has accumulated.
An abdominal ultrasound is commonly used because it can identify even relatively small amounts of fluid and help doctors assess its distribution. Depending on the patient’s condition, blood tests and additional examinations may also be necessary to investigate the underlying cause.
In many cases, doctors perform a procedure called diagnostic paracentesis, during which a small sample of abdominal fluid is collected using a needle. The sample can then be examined for signs of infection and other abnormalities.
Treatment depends on the condition responsible for the fluid buildup and its severity. When appropriate, medication and dietary adjustments may help control the accumulation.
However, when medication does not provide sufficient relief or a large amount of fluid has collected, doctors may recommend therapeutic paracentesis.
This procedure involves inserting a needle or small tube into the abdominal cavity to drain the excess fluid. Depending on the amount accumulated, several liters can be removed during a single session.
The procedure can provide significant relief, although patients may require additional treatment and monitoring to prevent the fluid from returning.
