10 Stomach Symptoms You Should Never Ignore

Fortunately, it’s usually not a symptom of anything life-threatening, says Dr. Nicholas E. Anthony, a gastroenterologist at Atrium Health in Charlotte, North Carolina. The most common causes are hemorrhoids and anal fissures (tears in the lining of the anus).

But blood in your stool can also be one of the first symptoms of colon cancer, especially if accompanied by a change in your bowel habits or the shape of your stool. Though colon cancer cases are rising in younger adults, it’s still most common in people over 50, so it’s especially important for older adults who notice blood in their stool to see a doctor without delay.

Other possible causes of bleeding are colon polyps, inflammatory bowel disease, colitis and diverticulosis.

3. Severe cramps after eating

Severe cramping is a warning sign of a bowel obstruction — a serious condition that requires immediate medical treatment. It’s also a classic symptom of IBS, a chronic digestive disorder that has been on the rise in the past several years.

Other IBS symptoms include abdominal pain (often related to bowel movements), bloating, gas, diarrhea or constipation. 

If you’ve had a tick bite a few weeks before cramping started, it could be alpha-gal syndrome, says Dr. Sarah McGill, a gastroenterologist at the University of North Carolina at Chapel Hill. She first reported on the illness in 2021.

“Alpha-gal syndrome causes delayed allergic reactions to eating foods made from mammals like pork, beef and dairy,” McGill says. Nighttime symptoms like cramping and diarrhea may be a hallmark of the syndrome, as reactions usually occur after eating the food, she adds.

4. Difficulty swallowing

If you feel like your food is getting stuck in your throat or hurts as it goes down, that can be a sign of something serious.

“The big thing we worry about is esophageal cancer,” Anthony says. Esophageal cancer is more common in adults over 55 and three or four times more likely to occur in men than women, according to the U.S. Centers for Disease Control and Prevention.

Other things that can cause discomfort when you swallow are an infection, an ulcer, a sore or scar tissue (which can develop if you have chronic acid reflux). Additionally, a growing number of people are being diagnosed with eosinophilic esophagitis (EOE), a chronic allergic inflammatory disease that is a major cause of swallowing issues.

To pinpoint the cause of your problem, your gastroenterologist will likely insert a tube with a camera attached to it down your throat in a procedure called an endoscopy.

5. Unexplained weight loss (especially if accompanied by abdominal pain)

Weight loss when you haven’t changed your diet or exercise habits is a common symptom of many serious illnesses, including cancer, Lee says.

“Most people gain weight as they get older because their metabolism slows down,” she says. “If you’re losing weight without much effort, that’s a red flag.”

See a doctor if you’ve dropped 5 percent or more of your body weight within six to 12 months. Although such weight loss is a symptom of some types of cancer, research suggests that in patients over 65 it is often due to other causes, such as peptic ulcers, inflammatory bowel disease, celiac disease or an overactive thyroid.

6. Chronic or prolonged constipation (especially if you’re having pain)

Almost everyone experiences occasional bouts of constipation, and studies show that it’s especially prevalent among older adults.

Constipation is typically defined as fewer than three bowel movements per week. It may not seem like a big deal, but if your constipation isn’t treated, over time the stools in your colon can become so large and solid that your body can’t remove them — and that can be painful or even deadly, Anthony warns.

“If it goes longer than seven days, I want to see you,” he says. Constipation can be caused by a wide variety of factors, including certain medicines, a diet low in fiber, and medical conditions such as IBS, thyroid issues, diabetes or, in rare cases, colorectal cancer.

Pelvic floor dysfunction and polypharmacy (taking several medications) are also common causes of constipation in older adults, says Dr. Bharati Kochar, a gastroenterologist at Massachusetts General Hospital in Boston.​

7. Sudden, intense abdominal pain

A sharp pain that doesn’t let up can indicate acute appendicitis (if it’s on your lower right side), diverticulitis or a serious infection. The context is important, Lee says, because muscle cramps and other issues can also manifest as sharp pain.

“If you’re an athlete rock climbing and you get a sharp pain in your abdomen that only lasts a second, you probably just pulled a muscle,” she says. If it’s something serious, she adds, the pain usually keeps escalating and doesn’t let up.

8. Frequent, severe or worsening heartburn

Occasional heartburn — a burning, uncomfortable sensation in your chest — is common among older adults and can usually be treated with over-the-counter medications. But if your heartburn is frequent and worsening, or if it’s not responding to medication, you may have gastroesophageal reflux disease (GERD), a disorder in which the valve between your stomach and esophagus doesn’t close properly.

Left untreated, GERD can lead to complications, including erosion or narrowing of the esophagus or a precancerous condition called Barrett’s esophagus. In rare cases, severe heartburn can also indicate a more serious condition, such as esophageal cancer or a hiatal hernia.

9. Swollen abdomen

It’s not unusual to feel bloated after you eat a big meal. But there’s a difference between bloating and distension, an actual increase in measured abdominal size.

“Do you literally see your belly puffing out? Is it bigger in circumference?” Spiegel asks. If the answer is yes — and the symptom persists after you’ve had plenty of time to digest a meal — it can be a sign that excess fluid or gas is forming in your small intestine as the result of an obstruction, inflammation, bacterial overgrowth or a gastrointestinal disease. 

A swollen stomach can also be a sign of celiac disease, which is on the rise in older adults. If your stomach is very distended and you’re not passing gas, that may indicate a bowel obstruction and you should head to the emergency room, Kochar says.

10. Feeling full after eating very little

If you feel stuffed even though you didn’t eat much, the most common cause is gastroparesis, a condition in which food stays in the stomach longer than it should.

It can happen when a severe illness “stunts the electrical system of the stomach,” Anthony says. Stomach surgery and diabetes can also trigger the condition, and it’s been reported as a side effect of newer weight loss medications.  

Although gastroparesis can resolve on its own, your doctor can prescribe medications that will stimulate your stomach to contract and help speed digestion. If it’s not gastroparesis, other more serious causes of early satiety include an ulcer, an obstruction or a tumor.

If you don’t have one of the above symptoms, don’t let that keep you from seeing a gastroenterologist if you suspect that something’s wrong, Lee says. The earlier you detect a problem, the more options you have and the better your chances of managing it successfully.

“The longer I do this, the more I realize that it doesn’t matter what the textbook says — patients know their bodies,” Lee says. “If something is not normal for you, then it is a red flag, even if it’s not on the list of top five. If something bothers you, you should get it checked out.”

Editor’s note: This story, first published Feb. 11, 2020, has been updated to include new information.