When you feel full, it might be because you overate. If you feel full when you have hardly eaten, it could indicate a problem. Many digestive conditions could give you this feeling.
If you are not eating much and you feel full, there is little you can do about it. If you experience this feeling together with other symptoms like difficulty swallowing, it could be due to achalasia. Your doctor will do tests to reach a diagnosis and recommend treatments.

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