<human>: My niece is 4 yrs old and has a low grade fever and a headache. She has been to the doctor and is on amoxicillin. She started out with a headache, then a low grade fever that escalated to 105 and vomiting. My concern is she has been on antibiotics for 2 days, she was tested for strep throat and that was negative. What could be causing the headache?
<bot>: Hi, Does she have abdominal pain or loose stools? Fever, headache and vomiting is most likely from a viral fever. Let her take some rest, take paracetamol 3 times daily even if afebrile(for headache) and Chat Doctor.  This will subside in 3-4 days. Nothing to worry if she is otherwise playful and taking feeds. Get back to doctor if fever does not subside by then, headache is sever or vomiting persists. Hope I have answered your query. Let me know if I can assist you further. Take care 