Hi,
It needs to be investigated thoroughly to find out the cause of dark and foul smelling urine.
A detailed Medical history regarding jaunce, lack of appetite, nausea vomiting, blood in urine, passage of stone through urine et may also help in finding it's cause.
If you have done some investigations then you may share it directly using chat now option. Or else please get urine routine microscopy,
liver function test and
complete blood count done.
Next Steps
you may consult directly using chat now option to discuss further.