Conversation: The conversation between human and AI assistant.
[|Human|] My husband has been running a fever of about 101 degrees for two nights.  Today he started hurting in his right flank area (from his abdomen towards his bladder)  He went to the doctor today and they did a urinalysis which showed no red or white blood cells. They gave him an antibiotic and sent his home, but no answers.  His fever is back up tonight and he is still hurting. Any ideas what might be the cause?
[|AI|]  Hi. Thanks for your query and an elucidated history. The type of the pain you explained and fever can be due to right sided kidney infection and if there is an obstruction to the urinary outflow due to stone or so, the urinalysis can be negative as the infected urine will not reach the bladder. The best way is to go for ultrasonography to confirm or rule out certain problems. Continue the antibiotics as he has fever. Give paracetamol for the fever. At the same time the possibility of appendicitis, right sided colitis has to be kept in mind. Ultrasonography may help to an extent for this too.