<s>[INST] Dear sir My son 3 year old he is vomiting after food .few days perfect but again he will start vomiting after food.he is little low weight.now he is around 12kg only.we consult many doctors.but every one said it will be clear in future he has no problem.how can overcome him from vomiting [/INST] HiT hanks for writing to Chat Doctor. Persistent vomiting needs complete evaluation. A basic Ultrasound abdomen to look for any obstructive causes is must. Deworming will help too, usually albendazole is given as single dose at night for that. If all the workup is negative, cyclical vomiting is a possibility. This can be treated with medicines like propranolol. Wishing your child speedy recoveryRegards Chat Doctor.  </s>