Distended Abdomen

A distended abdomen means your belly is swollen beyond its usual size. This can happen for different reasons. Healthcare providers diagnose a distended abdomen in terms of the “five fs”: flatus (gas), fetus (pregnancy), feces (trapped poop), fluid (from several causes) or fat.

It often comes with a bloated feeling, like fullness in your abdomen. In some cases, you may just notice that your belly looks larger than usual. The feeling can happen suddenly or come and go.

Treatment for abdominal distension depends on the cause. Some causes are related to conditions you can manage. Other causes may be due to something you ate. Most causes aren’t life-threatening. But you should seek medical care if you have severe pain, vomiting, fever or swelling that doesn’t go away.

What are the most common causes of abdominal distension?

There are many possible causes, and they don’t always feel the same. Some are related to digestion. Others are due to physical changes in your body. Healthcare providers often group these as organic or functional causes.

Organic causes

Organic causes are problems in your body that a healthcare provider can often see on imaging tests. Your abdomen may feel firmer or harder. The swelling may not go away after you poop or pass gas. You might also have pain or tenderness in your lower back or pelvis.

Some examples include:

• Inflammation of your abdominal lining (peritonitis)
• A build-up of fluid (ascites) caused by liver disease, heart failure or kidney disease
• Tumors or growths like ovarian cysts
• Significant weight gain
• Pregnancy

Functional causes

Functional reasons for a swollen abdomen often come from temporary issues, like eating too much or being constipated. It can also happen when air gets trapped in your stomach or when you react to certain foods. You may feel better after passing gas or pooping.

Some examples include:

• Gas
• Constipation
• Irritable bowel syndrome (IBS)
• Food intolerances or sensitivities
• Food moves too fast or slow through your digestive system

What are treatments for abdominal distension?

Treatment for abdominal distension depends on the cause. Your healthcare provider will try to find the cause by asking questions about your symptoms, eating habits and medical history. They’ll do a physical exam of your abdomen. They may also order imaging tests, like an ultrasound or a CT scan. The goal is to pinpoint what’s causing your discomfort.

Once your provider determines the cause, treatment can vary. It often falls into a few main categories, like:

• Diet and lifestyle changes: Changing what you eat can help with gas, bloating and food intolerances. This may involve eating smaller meals or avoiding carbonated drinks.
• Medicines: Stool softeners and laxatives can help with constipation. Antibiotics can treat infections such as peritonitis.
• Procedures or surgery: You may need surgery if the cause is a blockage, growth or tumor.
• Treatment of an underlying condition: Liver disease, IBD and other conditions can cause fluid buildup or inflammation. In these cases, the treatment is to manage that health condition.

With the right diagnosis and treatment plan, many people notice their symptoms improve over time.

What can I do to prevent abdominal distension?

Preventing a distended abdomen is easier when you know the cause. Sometimes, you can’t prevent it if the cause is physical. It may be easier to prevent functional causes when they’re related to eating. You may be able to make small changes. For example:

• Keep a food journal. Avoid foods that leave you feeling bloated (for example, eating less dairy or gluten).
• Try to exercise a little each day. It supports digestion and helps gas and poop move through your system.
• Eat smaller meals or wait longer between meals.
• Eat slowly and limit conversations during meals.
• Drink more water and eat more fiber-containing foods. Both help with digestion.

When should I be concerned about a distended abdomen?

Seek medical care if abdominal distension:

• Keeps getting worse and doesn’t go away within a few days
• Comes with severe abdominal pain
• Comes with symptoms of illness, such as fever, vomiting or pooping blood