<s>[INST] hi sir,my daughter is 4 yrs old and we have been to india last year for christmas and came back on january 13th 2011,right from then my child started spiking a fever. it happens about every three weeks to 1 month. she will be fine in the day, playing, going to school, the only thing is she says her belly is sore but doesn t complain too much. then when it comes to about 5pm she deteriorates very quickly. becomes very lethargic, sleeping, crying but not knowing whats wrong, shivering. her temperature goes up. this usually only lasts that one night and by the next day she s almost as normal...for another few weeks. [/INST] Hi Dear, Welcome to Chat Doctor. Understanding your concern. As per your query your daughter have symptoms of frequent fever and shivering which seems to be due to poor immunity of body which making your child susceptible to infections. Well this is something you should be concerned about as it could be due to underlying systemic pathology. Need not worry. I would suggest you to visit pediatrician once and get it examined. You should go for complete blood count and urinalysis done to detect level of infection and find out any systemic pathology. Start treatment after proper diagnosis. Till then take Ibuprofen/ Acetaminophen.  Chat Doctor.  You should do tepid sponging if fever is of high intensity. Take diet rich in multivitamins. Hope your concern has been resolved. Get Well Soon. Best Wishes, </s>