Understanding Gastroparesis: What People With Type 1 Diabetes Should Know

Gastroparesis is a digestive condition in which the stomach empties food into the small intestine more slowly than it should. Unlike conditions that involve a physical blockage, gastroparesis happens because the stomach's muscles aren't contracting properly or the valve between the stomach and small intestine (the pylorus) isn't relaxing as it should. This leads to food moving through the digestive system at a sluggish pace.

The condition is relatively uncommon—about 21.5 people per 100,000 have diagnosed gastroparesis. However, it affects far more women than men, with women being 2 to 4 times more likely to develop it.

While Type 2 diabetes is by far the leading cause of gastroparesis (responsible for about 51.7% of cases), Type 1 diabetes also increases risk. Type 1 diabetes accounts for roughly 5.7% of gastroparesis cases overall.

High blood sugar over time can damage the nerves that control stomach muscle function, potentially leading to gastroparesis. This is one reason maintaining good blood sugar control is important for overall digestive health, though it's worth noting that not everyone with Type 1 diabetes will develop this condition.

Gastroparesis typically causes nausea, vomiting, early satiety (feeling full quickly), bloating, and abdominal pain or discomfort. These symptoms can affect quality of life and make it harder to maintain consistent nutrition and blood sugar management.

If you experience persistent nausea, vomiting, or unusual fullness after meals, it's worth discussing with your healthcare provider, especially if you have Type 1 diabetes.

Diagnosis begins with ruling out mechanical blockages through upper endoscopy (a camera down the throat) or imaging like a CT scan. Once a blockage is excluded, doctors confirm gastroparesis using gastric emptying scintigraphy, a nuclear medicine scan that tracks how quickly food leaves your stomach. If the stomach retains more than 10% of food after 4 hours, gastroparesis is confirmed.

A newer option called the carbon-13 spirulina stable isotope breath test is also approved for diagnosing gastroparesis and may offer an alternative to traditional imaging.

Beyond diabetes, gastroparesis has several other known causes. Post-surgical effects account for 15% of cases, while medications cause about 11.8%, and idiopathic gastroparesis (no identifiable cause) accounts for 11.3%. Neurological disorders like Parkinson disease, thyroid problems, certain connective tissue disorders like scleroderma, and viral infections including SARS-CoV-2 can also trigger gastroparesis.

If you develop symptoms of gastroparesis, your doctor will take your full medical history and medication list into account when determining the underlying cause.

Source: JAMA. Evidence type: PubMed indexed literature. Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.