<s>[INST] My 3 year old had a stomach virus (vomiting, diarrhea) about 3 weeks ago. The rest of the family had it as well. She became regular again, but has since complained of always being hungry, her stomach hurts many times a day and she is always cold. Any thoughts on what that could be? [/INST] Hi...if the kid is otherwise active, no need to worry about it. She is just recovering from a viral diarrhea.The other possibility is that it could be a worm infestation and you need to use Alendazole for it, 400mg today and another dose after 10 days.Regards - Dr. Sumanth </s>