"Feifei, how long has this been going on? Do you have symptoms of painful urination, frequent urination, or urgency?" Liu Banxia asked after pondering for a moment.
"It's been about half a month," Tang Feifei said, lowering her head. "I don't have any of the symptoms you mentioned."
"And I've noticed that I can control it during the day. It only happens when I sleep at night. Could it be... my condition is part of some disease?"
"What about the amount of urine?" Liu Banxia asked again.
"Not much, just a little bit," Tang Feifei said, gritting her teeth.
Liu Banxia gave it more thought. This indeed doesn't quite meet the criteria for diabetes insipidus; Xu Hui's judgment was very accurate, he concluded.
"Let's do three tests," Liu Banxia said after some consideration. "The first one is a urine test to see if there's an infection. The second is a blood test, which is routine. The third is an MRI of the head to see if there's an issue with your cranium."
