Lifestyle

5 Warning Signs Your Burning Stomach Pain May Be an Ulcer, Not Heartburn

By Erica Coleman · August 13, 2026

You’ve been taking Tums for months. The burning keeps coming back. The problem may not be acid coming up — it may be a hole forming in your stomach lining.

Roughly 4.6 million Americans are diagnosed with peptic ulcers every year, and a significant number live with them undiagnosed because the symptoms overlap almost entirely with acid reflux and ordinary indigestion. The treatments are different, the causes are different, and waiting too long can turn a treatable condition into an emergency.

The pain is gnawing and deep — not burning and rising. Acid reflux produces a burning sensation that moves upward from the stomach toward the throat. Ulcer pain is different — it’s a gnawing, aching, or boring pain that stays planted in the upper middle abdomen, between the navel and the breastbone. If the discomfort feels like something is eating through your stomach lining rather than rising up your chest, the location and quality of the pain point toward an ulcer.

The pain gets worse on an empty stomach — not after eating. Acid reflux typically flares after meals, especially fatty or spicy ones. Ulcer pain follows the opposite pattern — it intensifies when the stomach is empty, often waking people between 1 and 3 a.m. Eating temporarily relieves the pain because food buffers the acid against the exposed ulcer. If your stomach hurts most when you haven’t eaten, reflux is the wrong diagnosis.

Antacids help temporarily — then the pain returns unchanged. Both conditions respond to antacids in the short term. But ulcer pain comes back in the same location, at the same intensity, in a cyclical pattern that antacids can mask but never resolve. If you’ve been managing “heartburn” with over-the-counter medication for weeks and the pattern hasn’t changed, the underlying condition isn’t being treated.

You feel full after eating very little. Early satiety — feeling like you can’t finish a normal-sized meal — is a common ulcer symptom that rarely occurs with standard acid reflux. The inflamed stomach lining becomes sensitive to stretch, and the fullness can be accompanied by bloating and nausea that persist long after the meal.

You’re taking NSAIDs regularly. Ibuprofen, aspirin, and naproxen are the second most common cause of stomach ulcers after H. pylori bacterial infection. Long-term NSAID use erodes the mucous layer that protects the stomach lining from its own acid. If you take these medications regularly for joint pain, headaches, or heart protection, and you’re experiencing any of the symptoms above, the connection may be causal — and your doctor needs to know about both the symptoms and the medication.

An ulcer left untreated can bleed, perforate, or obstruct the digestive tract — all of which are emergencies. Black or tarry stools, vomit that looks like coffee grounds, and sudden severe abdominal pain are signs to go to the ER. But catching it before that point requires one thing: recognizing that what you’ve been calling acid reflux might not be.