Gastroparesis Symptoms

The main symptoms of gastroparesis are nausea, vomiting, feeling full soon after starting to eat, bloating, and upper abdominal discomfort. They happen because food sits in the stomach too long. Symptoms can be mild and occasional or severe and daily, and they often change from week to week.

What are the symptoms of gastroparesis?

Gastroparesis affects how the stomach handles a meal, so most symptoms appear during or after eating. The National Institute of Diabetes and Digestive and Kidney Diseases lists the most common ones as feeling full soon after starting a meal, feeling full long after eating, nausea, vomiting, bloating, belching, upper abdominal pain, heartburn, and poor appetite. Vomiting may bring up food eaten several hours earlier, because it has not yet left the stomach. Many people also find that symptoms are worse after large or high-fat meals, which take the longest to digest. When symptoms suddenly intensify for a stretch of days, see our guide to managing a gastroparesis flare-up.

What does gastroparesis feel like?

For many people, the first sign is early fullness. A few bites into a meal, the stomach already feels full, and finishing a normal portion becomes hard. Nausea is the most constant complaint, and it can last for hours after eating or even between meals. Some people describe a heavy, bloated feeling in the upper belly, along with burping and reflux. Because the stomach stays full, appetite often drops, and meals begin to feel like a chore rather than a pleasure.

Can gastroparesis cause weight loss and malnutrition?

Yes. When nausea and early fullness make eating difficult, people may not take in enough calories or nutrients, and unintentional weight loss can follow. Over time, this can lead to malnutrition, with signs such as ongoing tiredness, dizziness, and a pale appearance. Frequent vomiting adds the risk of dehydration and the loss of important salts called electrolytes. These problems are part of why the condition is watched over time and why a registered dietitian is often part of care. Steady, small, nutrient-dense meals help protect against them, and our gastroparesis diet guide explains how to build them.

What other complications can gastroparesis cause?

Food that lingers in the stomach can harden into a solid mass called a bezoar. A bezoar can cause nausea and vomiting and, in some cases, block the outlet of the stomach and need treatment. Slow-moving food can also ferment and encourage bacterial overgrowth. For people with diabetes, an unpredictable stomach makes blood sugar harder to control, because food and insulin no longer arrive on the same schedule. In severe cases, when the stomach cannot keep up at all, a person may need liquid nutrition or a feeding tube for a time. Our page on gastroparesis complications covers these risks in more detail.

How are gastroparesis symptoms different from other conditions?

Gastroparesis shares symptoms with several other digestive problems, which is part of why it is often missed at first. Heartburn and reflux can look like ordinary acid reflux. Upper belly pain and fullness overlap with functional dyspepsia, a common condition with similar discomfort but normal stomach emptying. Nausea and vomiting can also come from an ulcer or a physical blockage. Doctors tell these apart by measuring how fast the stomach empties, which is why diagnosis matters. See how gastroparesis is diagnosed and the full list of causes.

Sources

Reviewed by Owen Hastings. NIDDK (National Institute of Diabetes and Digestive and Kidney Diseases), Symptoms and Causes of Gastroparesis (niddk.nih.gov), last reviewed January 2018, for the symptom list and the warning signs that need urgent care. Cleveland Clinic, Gastroparesis (my.clevelandclinic.org), for complications including bezoars, bacterial overgrowth, and feeding support in severe cases. This page is general health information, not medical advice. Talk to your doctor about your own symptoms. Last reviewed June 2026.