You know your body. You know what normal digestion feels like. Maybe you go to the bathroom every morning. Maybe you deal with bloating or constipation now and then.
What if your digestion suddenly doesn’t feel right? Could it be something you ate? Is it stress? Or is it something more serious?
Israa Hegazy, a nurse practitioner specializing in gastroenterology with Banner - University Medicine, says the most important question to ask is whether the symptoms are new, changing or getting worse.
“The key is not just that you have symptoms,” she said. “It’s whether they are different from your normal pattern or accompanied by alarm features. That’s when you want to evaluate further.”
Read on to learn what changes count as red flags, what may be harmless and how to protect your digestive health.
What counts as a sudden change that needs attention?
Digestive symptoms are common. Nearly half of people experience them at any given time. Most are uncomfortable but not dangerous. Still, some symptoms are considered alarm features or red flags.
Here are symptoms you shouldn’t ignore:
- Unintentional weight loss of more than 10% of your body weight
- Blood in your stool
- Vomiting blood (bright red or coffee-ground appearance)
- Vomiting that does not stop
- Difficulty swallowing that gets worse over time
- Severe abdominal pain that is worsening
- Symptoms that wake you up at night
- New or worsening heartburn
- Feeling full quickly (not related to GLP-1 medications)
- New digestive problems after age 50
- Recent changes in bowel habits in someone over 60
If you notice any of these symptoms, see your health care provider. “These symptoms don’t automatically mean something serious,” Hegazy said. “But they are signals that we need to look deeper and make sure nothing dangerous is going on.”
Common harmless causes of digestive upset
It helps to remember that many digestive changes are temporary and mild.
Common causes include:
- Stress and anxiety: Your brain and gut are connected. When you're overwhelmed by work, school or life changes, your digestive system reacts.
- Diet changes: Traveling, eating out or trying a new diet can upset your stomach. Eating more fiber or protein than usual can also cause bloating, mild constipation, or changes in bowel habits.
- Food intolerance: Some people have symptoms after eating dairy or other trigger foods.
- Dehydration: Not drinking enough water can cause constipation and stomach discomfort.
- Medications or supplements: Antibiotics can change bacteria in your gut. Iron pills can cause constipation. Some pain medicines can irritate your stomach.
- Viral gastroenteritis (stomach flu): Usually causes vomiting and diarrhea but clears up in a few days.
- Irritable bowel syndrome (IBS): Can cause symptoms but does not damage your intestines.
“These conditions are common and not dangerous,” Hegazy said. “But if symptoms change or don’t improve, that’s when you should get checked out.”
How digestive changes differ by age
Your age changes how we evaluate digestive symptoms.
Children
In children and teenagers, digestive problems like IBS are common. Abdominal pain is often related to stress, school or anxiety. The symptoms can seem very severe and intense.
“Most digestive issues in young people are not serious," said Hegazy. "But appendicitis is still the most common surgical emergency in this age group. Severe pain that moves to the lower right side of the belly, fever or increasing tenderness should always be taken seriously and checked by a health care provider."
In adults over 40
As you get older, new digestive symptoms need more attention. The risk of serious health problems, including cancer, increases with age. Disorders like IBS become less common, so new symptoms are more likely caused by something structural.
Constipation also happens more often because of medications, less activity and changes in how the gut works with age. Older adults might not show obvious signs of infection, like fever or bloody diarrhea, even when something serious is happening.
“The gut becomes more vulnerable with age,” Hegazy said. “That’s why new symptoms later in life should not be dismissed.”
When digestive changes could signal something more serious
Digestive issues that last longer than two weeks should be checked out, especially if they are new for you.
Call your health care provider if you experience:
- Bloody or mucous-filled diarrhea with fever
- Diarrhea lasting more than a week
- Repeated vomiting
- Worsening moderate stomach pain
- New diarrhea after recent antibiotic treatment (possible C. difficile infection)
- Signs of dehydration, such as feeling dizzy when standing up
Go to the emergency room if you experience:
- Very low blood pressure, fast heartbeat or a high fever above 101.3°F
- Sudden, intense stomach pain
- A hard or stiff-like abdomen
- Vomiting blood
- Heavy rectal bleeding along with dizziness or fainting
- Severe dehydration with confusion or the inability to keep fluids down
- Severe abdominal pain with fever and bloody diarrhea
- Stomach pain in someone over 50 who looks very ill
These are medical emergencies, so do not delay care.
How are digestive issues diagnosed?
Your health care provider or a gastroenterologist will start by asking you questions about your symptoms, medical history, family health, medication use and whether you have to strain or feel like your bowel (your poop) isn't emptying completely.
“They will do a physical exam, which usually includes an abdominal exam," Hegazy explained. "Sometimes, they will do a digital rectal exam to check for hemorrhoids, masses or how the pelvic floor is working."
Basic blood tests may check for:
- Anemia (complete blood count)
- Inflammation (C-reactive protein)
- Celiac disease (gluten sensitivity)
If you have diarrhea, stool tests may check for:
- Inflammation markers
- Infections such as giardia
- Bile acid diarrhea, especially after gallbladder removal
Procedures may include:
- Upper endoscopy for upper digestive symptoms
- Colonoscopy for patients over 45 or anyone with blood in stool, anemia or other red flags
- Specialized testing for pelvic floor dysfunction in severe constipation
“The goal is not to jump straight to invasive tests,” Hegazy said. “Your provider will tailor based on your symptoms, age and risk factors.”
How to support your digestive health
While not every digestive change can be prevented, you can support gut health by:
- Eating a balanced diet rich in fiber
- Drinking enough water
- Limiting processed foods
- Managing stress
- Staying active
- Avoiding tobacco
- Limiting alcohol
Takeaway: Trust your gut
You know your body better than anyone. If something feels wrong, trust that instinct. Digestive symptoms are common but persistent or sudden changes deserve attention.
Most digestive problems are manageable. The earlier you seek care, the more options you may have.
You do not have to live with discomfort or uncertainty. Schedule an appointment with your provider or a Banner Health specialist. Your gut health matters. And help is here when you need it.
