What might cause my upper stomach to feel weird or unusual?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Discomfort or a "weird" feeling in your upper stomach is often caused by acid reflux (GERD), indigestion, gastritis, or ulcers. It can also stem from thyroid conditions, since hyperthyroidism and hypothyroidism can disrupt digestion, slow gut motility, or trigger nausea and bloating. Other possible causes include gallbladder issues, food intolerances, stress, or early signs of a more serious condition.

Because symptoms overlap across many conditions, self-diagnosing can be tricky—and delaying care may allow a treatable issue to worsen. The fastest way to narrow down what's going on is to complete a free, instant, and private online symptom check. In just a few minutes, you'll get personalized insights based on your specific symptoms, plus clear guidance on whether home care, a primary care visit, or a specialist is your best next step.

Reviewed for medical accuracy: 07/15/2026

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Explanation

Your upper stomach might feel unusual for a few reasons. One common cause is gastroesophageal reflux disease (GERD), where stomach acid moves up into the esophagus, leading to discomfort. This can also cause symptoms in the head and neck area, like a sore throat or a feeling of a lump in the throat.

Another possible reason could be related to your thyroid. The thyroid gland, which is in your neck, can affect your stomach and intestines. If the thyroid isn't working right, it might cause problems like stomach pain or a weird feeling in your stomach.

Sometimes, taking certain medications, even in small doses, can cause sudden and severe stomach pain. If you're experiencing this kind of pain, it could be a reaction to something you've taken.

If you're feeling unusual discomfort in your upper stomach, it's important to pay attention to other symptoms you might have. Try our free AI symptom checker to help identify what might be causing your discomfort and determine if you should speak with a healthcare professional.

(References)

Torres D, Parrinello G, Trapanese C, & Licata G. (2010). Sudden severe abdominal pain after a single low dose .... American journal of therapeutics, 19829093.
Ebert EC. (2010). The thyroid and the gut. Journal of clinical gastroenterology, 20351569.
Ahuja V, Yencha MW, & Lassen LF. (1999). Head and neck manifestations of gastroesophageal reflux .... American family physician, 10498113.

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