What is the reason for a 4-year-old child spitting up a lot of saliva?

Patient's question:

No

Doctor's answer:

It may be caused by gastritis and requires oral medication such as amoxicillin-clavulanate potassium, omeprazole, and citalopram. Avoid spicy, alcoholic, cold, greasy, and other irritating foods. Eat meals on time. If the effect is not good, have an endoscopy and ultrasound examination at the hospital.