Gastritis Symptoms Women Over 40 Should Never Ignore—Including Fatigue, Brain Fog and Stomach Pain

If you’ve been brushing off stomach pain, exhaustion or that nagging indigestion as “just getting older,” you deserve real answers. That discomfort you’re feeling—the kind antacids can’t touch—may actually be gastritis, a common but often overlooked condition that affects women over 40 more than you might think. Here, we reveal the gastritis symptoms you need to know. Once you understand what’s happening, there are easy ways to feel better.

What is gastritis and what causes it?

Gastritis happens when your stomach lining becomes inflamed, often because stomach acid levels drop too low. We need adequate levels of this acid to help us digest our food and absorb energizing nutrients. Our knee-jerk reaction to the pain may be to pop an antacid. The hitch? “Because the problem is low stomach acid, in the long run antacids/acid blockers make the problem worse,” explains Jacob Teitelbaum, MD, author of From Fatigued to Fantastic!

The different types of gastritis and their symptoms

This condition can take different forms, caused by different triggers. Here’s a quick look at four types, from autoimmune to acute gastritis, and the symptoms they can cause:

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Common gastritis

This is often caused by an infection from Helicobacter pylori bacteria, which cause inflammation that can disrupt stomach acid levels. There may be no symptoms or you may feel upper abdominal burning and experience bloating, nausea or burping. H. pylori is common in human stomachs, found in up to 35 percent of people, but that figure increases with age.

NSAID-induced gastritis

In this case of acute gastritis, a chemical, like those in medications such as ibuprofen, naproxen or aspirin, can cause inflammation of the stomach lining, leading to pain or nausea. In some cases, it can trigger symptoms such as stomach bleeding.

Alcohol-induced gastritis

Alcohol use can irritate the stomach’s delicate lining, causing a burning pain. It often triggers a loss of appetite, nausea or vomiting. Over time, heavy alcohol use can increase the risk of erosive gastritis, which wears away the stomach lining.

Autoimmune gastritis

Here, the cells of the stomach lining, responsible for making acid to break down food, go rogue and attack themselves. This process depletes helpful acid and can cause damage. It also triggers nutrient deficiencies since the stomach can no longer absorb vitamins properly.

“Early on, indigestion from low stomach acid is the key symptom, but is only present in about 60 percent of cases,” says Dr. Teitelbaum. “As it progresses, autoimmune gastritis causes iron and B12 deficiencies.” Low iron causes fatigue, brain fog, achiness and even restless legs. And low B12 causes fatigue, brain fog, numbness and tingling in the fingers and toes and even nerve pain.

This type of gastritis has been in the news recently because wellness advocate Bryan Johnson, from the Netflix documentary Don’t Die, announced that he was diagnosed with it. He said, “My immune cells are confused, causing my stomach to eat itself.”

Why gastritis symptoms can be easy to miss

“Your stomach doesn’t always complain when it’s in trouble,” says Sameer Berry, MD, chief medical officer at the gastrointestinal care clinic Oshi Health. “Gastritis is usually asymptomatic. Some of the most important cases I diagnose show up not as stomach pain, but as exhaustion.” Why? Because “silent” stomach problems turn into real nutrient deficiencies. “I’ve seen women sent in for ‘low energy’ whose real problem was their stomach all along.”

Autoimmune gastritis often gets dismissed in women

“Autoimmune gastritis affects about three percent of adults, but as many as 19 percent of women over 50 have a positive screening test,” explains Dr. Teitelbaum. “The diagnosis is often missed and blamed on other more common issues.” It is chalked up to age-related fatigue or menopause, which can leave women feeling frustrated.

Dr. Teitelbaum offers more insights. “Women are three times as likely as men to get autoimmune conditions.” One reason: “Estrogen is a key immune regulator. So autoimmune illnesses are more common as estrogen levels drop with perimenopause and beyond.”

“What I can tell you from practice is this: The disease smolders quietly for years, then tends to surface in a woman’s 40s and 50s,” adds Dr. Berry. “Perimenopause doesn’t cause autoimmune gastritis, but it gives it the perfect place to hide. When the fatigue and the fog and the ‘off’ feeling all get filed under hormones, nobody checks the stomach.”

Talking to your doctor about gastritis symptoms

Be aware of any vitamin deficiencies that might hint at a stomach-lining problem. “Checking for iron and B12 deficiencies should be a routine part of evaluating fatigue or cognitive problems,” says Dr. Teitelbaum. “Especially if digestive issues are also present.” He adds you can also request a parietal cell antibody (PCA) test to check stomach acid levels and look for antibodies your immune cells may be making in the stomach.

“My practical advice is to keep a simple two- to three-week log: what you ate, what you felt and when. Patterns of symptoms and behaviors are very helpful when you visit your doctor,” says Dr. Berry. “Don’t be afraid to ask for a specific workup if you are concerned. Instead of ‘I’m always tired and my stomach is off,’ it is perfectly OK to ask: ‘I’m concerned about autoimmune gastritis — can we check my blood count, vitamin B12 and iron levels?’”

Getting diagnosed with gastritis

The most reliable way to confirm gastritis is through an upper endoscopy procedure, where your doctor examines your stomach lining and takes a small tissue sample for testing. “The definitive answer comes from a gastroenterologist,” confirms Dr. Berry. “Push for that referral if you have persistent upper-abdominal pain, ongoing nausea or vomiting, unexplained weight loss or anemia.”

3 ways to feel better if you have symptoms of gastritis

If you’re dealing with gastritis symptoms like stomach discomfort, nausea or fatigue, these expert-backed tips can help.

Treat low acid

This is super important: Work with a doctor to get more acid into the stomach to aid in digestion. “Taking betaine HCL (hydrochloric acid) with pepsin or a vinegar-based salad dressing with meals helps,” advises Dr. Teitelbaum. Consuming apple cider vinegar or lemon juice can help too. “Dilute 1 Tbs. of ACV or lemon juice in a small glass of water right before eating supplies the missing acid needed to help digestion,” he says.

Correct nutrient deficiencies

“People with autoimmune gastritis should be on a high potency multivitamin containing at least 250 mcg of B12,” says Dr. Teitelbaum. “If the [iron] ferritin is under 60, I recommend iron 25 mg every other day taken with vitamin C to enhance the iron’s absorption.” Also, eat a balanced, nutrient-dense diet.

Try lifestyle tweaks

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“There is no cure for autoimmune gastritis,” says Dr. Berry. Manage it with the previous two tips. “I steer patients toward gentle, easy-to-digest meals: oats, rice, sweet potatoes, baked fish or skinless chicken and well-cooked, non-acidic vegetables. Try to avoid alcohol, NSAID pain relievers, fried and heavily processed foods and, for many people, caffeine, citrus and tomatoes.” How you eat also matters. He advises, “smaller, consistent meals, eaten slowly.”

Hope and healing: What to expect from gastritis treatment

“The silver lining is that once the diagnosis is made, many patients tell me they finally understand why they’ve felt unwell for years,” says Ekta Gupta, MBBS, chief of gastroenterology at the University of Maryland Medical Center. “With appropriate treatment, vitamin replacement and ongoing monitoring, most people regain their energy, protect their long-term health and return to living full, active lives.”

Bottom line on gastritis symptoms

“Gastritis is usually short-lived: triggered by an H. pylori infection, NSAID pain medication or alcohol,” says Dr. Berry. And even the more chronic autoimmune form can be managed effectively with the right supplements and lifestyle changes. The keys are staying on top of your iron and B12 supplementation, working on acid levels and advocating for your health. Dr. Berry stresses, “Fatigue is a symptom, not a diagnosis, and it deserves a proper workup.”