What causes recurrent vomiting of undigested food in humans?

Recurrent vomiting of undigested food in humans can be caused by various factors, including gastrointestinal obstruction, gastroparesis, or underlying conditions such as pyloric stenosis or gastroesophageal reflux disease (GERD). These conditions can hinder the normal passage of food through the digestive tract, leading to the regurgitation of undigested material. Additionally, certain infections, metabolic disorders, or neurological conditions may also contribute to this symptom. It's essential to consult a healthcare professional for accurate diagnosis and treatment.