For a stay longer than 180 days, the flat-rate per diem is 55 percent. Rates are fixed, and partly based on the cost of living in a location. Johnson said the changes are meant to give long-term TDY travelers an incentive to seek out extended-stay lodgings, which generally are less expensive.
Bilirubin is a yellow pigment that causes jaundice and dark yellow colored urine when present in increased amounts. Some people normally have higher bilirubin in their blood. This is known as Gilbert's disease. So their urine will naturally have more bilirubin.
Doctor can evaluate: Brown urine means go to the doctor (brown coloring can be from blood cells breaking, muscle cells breaking, etc...). An evaluation is needed now, before things get worst. Tests will be done to find out why the urine is brown, why there is decreased urine output, and why there is back pain.