A distended abdomen and nausea after eating may be caused by overeating and other habits, as well as a variety of health problems, such as irritable bowel syndrome, lactose intolerance or an intestinal blockage. If your abdomen hurts to the touch, or if you have persistent nausea or swelling, see your doctor.
Overeating
Eating too much too quickly can lead to abdominal swelling and nausea. Once you digest your meal, your discomfort and distension should go away. To avoid the problem in the future, simply eat smaller meals. Another cause of these symptoms is air swallowing. You may do this while you eat, or as part of a nervous habit. Eating more slowly may help. Using a straw or drinking carbonated sodas may contribute to air swallowing. You also may swallow air if you suck on hard candies or chew gum, and eliminating these may help.
Irritable Bowel Syndrome
Irritable bowel syndrome, or IBS, is a set of symptoms that may include abdominal distension and nausea. Other symptoms are diarrhea, constipation and abdominal pain. You might also have a lack of appetite if you have IBS. These symptoms may occur after meals, and may be exacerbated during times of stress. Your doctor can recommend lifestyle changes, such as exercising, getting more sleep, eating smaller meals and consuming more fiber, that can help you manage your symptoms of IBS.
Lactose Intolerance
A diagnosis of lactose intolerance means that you do not have the enzyme that you need to digest dairy products that contain lactose, or milk sugar. The symptoms include abdominal swelling, diarrhea, nausea and excess gas, and they usually occur within 2 hours of consuming lactose. This condition can come on gradually, or it can occur suddenly in response to a gastrointestinal infection or surgery on your intestines. You can reduce or eliminate your discomfort by cutting out dairy products that contain lactose. Some people with lactose intolerance can consume lactose along with lactase enzyme tablets or drops.
Other Causes
Other causes of abdominal swelling and nausea after eating can be benign or serious, so if you are unsure what is causing your discomfort, see a doctor for diagnosis. Autonomic neuropathy, a nerve disorder, can cause these symptoms if it affects the digestive system. A partial intestinal blockage can cause similar symptoms and requires medical care.
