 [ Symptoms ] what causes sudden dark brown urine in men  my husband recently had a kidney stone went to the hospital he was told he had many stones left in his kidneys he asked me if i had had diarrhea thinking we ate something bad within last week or so he is having abdominal pain again this time he went to the bathroom urinated & it was dark brown like coffee he has not had this before what are the possible causes of this we have not eaten anything like rhubarb or dark greens and only had one cup of coffee this morning as usual help [ Disease ] i would need to know her height as well in order to know if her weight is appropriate the age is really not the relevant