Postprandial hypotension: This condition is characterized by a drop in blood pressure after eating, leading to dizziness. It is a common cause of dizziness after meals, especially in older adults.

Vasovagal syncope: This condition can be triggered by eating and is characterized by a sudden drop in heart rate and blood pressure, leading to dizziness or fainting.
Gastroesophageal reflux disease (GERD): Although not directly causing dizziness, GERD can lead to discomfort that may contribute to feeling lightheaded after eating.
Food intolerance: Intolerances to certain foods can cause a range of symptoms, including dizziness, due to the body's reaction to the food.

Myocardial infarction or acute coronary syndrome: While less common, chest pain or discomfort after eating can sometimes be accompanied by dizziness and should not be missed due to the potential for severe cardiac complications.
Pulmonary embolism: Although rare, a pulmonary embolism can cause sudden onset of dizziness among other symptoms, and is a life-threatening condition that requires immediate medical attention.
Hypoglycemia: Especially in diabetic patients, hypoglycemia can occur after eating due to excessive insulin or oral hypoglycemic medication, leading to dizziness among other symptoms.

Pheochromocytoma: A rare tumor of the adrenal gland that can cause episodes of high blood pressure, tachycardia, and dizziness, potentially triggered by eating.
Mastocytosis: A condition characterized by an accumulation of mast cells in the body, which can release histamine and other mediators, leading to a range of symptoms including dizziness after eating.
Abdominal aortic aneurysm: Although very rare, an abdominal aortic aneurysm can cause abdominal pain and dizziness after eating due to the risk of rupture.