<s>[INST] My 3 1/2 year old son suddenly started complaining of stomach pain and pain at the top of his head a few hours ago. He is sleeping now, and is starting to feel a bit warm. His heart rate seems fast and his breathing is quicker and shorter than normal. He has not had a full bowel movement today, just a couple of partials, and has refused most food. Please help- [/INST] Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Looks like he might start to have a viral illness. I will explain you how a viral illness behaves so that you can be more confident. Fever of few days without any localizing signs could as well a viral illness. Usually rather than fever, what is more important is the activity of the child, in between 2 fever episodes on the same day. If the kid is active and playing around when there is no fever, it is probably viral illness and it doesn't require antibiotics at all. Once viral fever comes it will there for 4-7 days. So do not worry about duration if the kid is active. Paracetamol can be given every 4-6th hourly that too only if fever is more than 100F. I suggest not using combination medicines for fever, especially with Paracetamol. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr Sumanth Amperayani </s>