<s>[INST] I have really mild pain on both sides of my belly, I have fever for 5 days everyday after 4pm. in the mid night the fever will up to 104 F, normally goes away in the daytime. I have been taking Advil 200mg when I was very cold and shaking. My urines color is very very very light brown. But I have no problem and no pain to go to the restroom. Could you tell me what do you think? Thanks for your help. [/INST] Hello, Thanks for the query to Chat Doctor. Forum. Fever 104 F, from last 4 day and urine brown color may be due to ketone body in the urine. Usually due to breakdown of R B Cs there develops rise in bilirubin level and this raised level of bilirubin develops brown color in urine. 2nd reason may be due to some infection in kidney as there is fever also. Get in blood for bilirubin level (direct & indirect), serum creatinine level for kidney, Urine complete examination is very important. Consult a physician and get his opinion. Good luck.  </s>