<s>[INST] My 3 yr old son last weekend, acted fine then randomly puked. Puked off and on Saturday would feel fine in between but start crying stomach hurt then puked. He did this Saturday and Sunday then was fine all week then this weekend comes around was fine Sunday morning then evening same thing with the puking, woke up This morningate breakfast then ate lunch then started puking again this evening. Has no other symptoms and has never had any other medical conditions. Any suggestions? [/INST] Hello,Common causes of vomiting in children are infections, regurgitation, food allergies, etc. You may start giving medications like syrup Ondansetron. If symptoms not relieved then consult doctor and ask for investigations like USG Abdomen, CBC, etc.Hope I have answered your query. Let me know if I can assist you further.Regards,Dr. Khan Shoeb Mohammad Sher Mohammad </s>