Stomach pain is mostly caused by gastritis and digestive tract ulcer. It is recommended to take omeprazole+bismuth pectin+amoxicillin orally for 4-6 weeks. Traditional Chinese medicines Weikangling, Weierkang and Miaochangweishu also have good effects, but the diet should be regular, eat more digestible soft foods, avoid spicy and irritating foods, and use drugs that stimulate the stomach with caution, such as aspirin. I wish you a speedy recovery.