Why do I have so much gas? Causes and solutions

What is gas and why does it occur?

Intestinal gas, according to WebMD, is a natural result of digestion. It is produced by the fermentation of undigested food in the colon, and sometimes it comes from swallowed air. 

This gas can leave the body as burps or flatulence, which is a normal process and part of healthy digestive function. 

Passing gas between roughly 5 and 20 times a day is generally considered normal, and some estimates are higher. This number is an average and can vary with factors such as diet and habits. Gas is not necessarily a problem, especially if it occurs without other symptoms. 

Although it is normal, in some cases gas can point to a problem in the digestive system, such as food intolerances, gastrointestinal infections, or chronic diseases. In any case, a healthcare professional can determine when gas is due to one of these problems and recommend ways to address them. 

Common causes of gas

Besides swallowed air and normal digestion, gas has other causes related to diet, digestive function, and the bacteria in the colon.

Foods that cause gas

As mentioned earlier, gas is produced by the fermentation of some foods in the large intestine; however, some foods produce more gas than others.

WebMD notes that the likelihood of gas increases with certain foods, many of them rich in carbohydrates that are hard to digest. Some examples are:

• Beans.
• Vegetables such as broccoli and cabbage.
• Some fruits.
• Dairy products such as milk, ice cream, and yogurt.
• Whole-grain foods.
• Sugary drinks.
• Beverages that contain corn syrup.

This happens because these foods contain substances that the body has a hard time digesting. Keeping a food diary can help identify triggers, and a doctor or registered dietitian can help determine the cause, sometimes with tests.

Food intolerances and celiac disease

Food intolerances can also cause gas. Cleveland Clinic notes that they occur when the digestive system cannot properly break down certain foods, which can cause gas, bloating, and other unpleasant symptoms.

Some of the most common are lactose intolerance and gluten sensitivity. Celiac disease, an autoimmune condition, can also cause gas. In all of these cases, people have to limit certain foods because their digestive system cannot process them properly.

In celiac disease, gluten, a protein found in wheat, barley, and rye, triggers an immune reaction that damages the lining of the small intestine. Food intolerances and celiac disease cannot be self-diagnosed, so it is advisable to see a doctor if they are suspected. 

Constipation and slow digestion

Constipation and slow digestion can also influence gas production. WebMD notes that when digestion is slow, food stays in the colon longer, which gives bacteria more time to ferment it and allows gas to build up.

In some cases, this can also cause a bloated feeling and general discomfort.

To help relieve constipation, it can help to eat a balanced diet rich in fiber (see our food pyramid guide), drink enough fluids, and stay physically active. If constipation persists, a doctor can rule out other causes.

Bacteria in the colon

Finally, WebMD also discusses the role that bacteria play in gas production.

Bacteria play an important role in digestion, because they help break down undigested food that reaches the colon. When they overgrow, more gas can be produced.

Gut bacteria are normally beneficial, but an imbalance or overgrowth can increase gas. In some cases, a doctor may prescribe antibiotics to treat a bacterial overgrowth. Antibiotics should never be taken without a prescription. 

Symptoms associated with gas

Symptoms of excess gas vary with the cause. The most common are abdominal bloating, abdominal pain or cramping, and general discomfort.

The Ohio State University Wexner Medical Center notes that gas accompanied by symptoms such as bleeding, unintended weight loss, or persistent pain can point to serious underlying conditions. When these symptoms appear, it is essential to seek medical care.

The diagnosis of gas-related conditions is made by a healthcare professional based on a comprehensive evaluation, which may include blood tests, X-rays, stool tests, endoscopies, and colonoscopies.

Medical conditions associated with excess gas include irritable bowel syndrome and inflammatory bowel disease; in rare cases, gas can accompany colon or stomach cancer. 

When gas increases

It is normal to notice more gas at certain times of the day, because the body’s physiological processes at night and in the morning influence when gas is released. 

Gas can also increase after significant changes in lifestyle or diet. The following sections explain the main reasons. 

Gas in the morning

An article from Verywell Health notes that gas is often released in the morning. This is common and normal: the anal sphincter is more relaxed during sleep and relaxes spontaneously as a person wakes, which makes it easier for gas to pass. 

Gas production continues during sleep, and although some gas can be released while asleep, it is often passed in the morning. This is especially common in people with a morning bowel routine. 

Changes in diet and lifestyle

Major changes in diet or lifestyle can also affect gas production, because the digestive system needs time to adapt to new foods and routines. 

If a person starts eating more fiber than usual, for example, the digestive system may need time to adjust, which can increase gas. Foods that are not part of a person’s usual diet can be harder to digest and are therefore more likely to be fermented by bacteria in the colon. 

According to Verywell Health, lifestyle changes that can help prevent increased gas include eating more slowly, increasing fiber intake gradually, and reducing the amount of carbohydrates that tend to cause gas. 

Gas at night

Nighttime flatulence is also possible, especially when certain foods and beverages are consumed shortly before bed. To reduce gas at night, Healthline recommends avoiding carbonated drinks and habits that cause people to swallow air, such as eating too quickly, chewing gum, or drinking through a straw. 

If gas becomes persistent or bothersome, a doctor can evaluate the causes and provide personalized recommendations.