** Thanks for contacting HCM with your health concern. 1. dark yellow urine might indicates UTI [urinary tract infection] but people taking multivitamins,food dyes, having dehydration,diabetes,enlarged prostate,kidney problem can also have dark urine. 2. since there is no pain,no burning sensation,fever,frequent urgeency to pass urine thus one can exclude UTI initially but see an Urologist for examination and investigation [if needed] 3. Till you see your Attending physician; . drink plenty of water/fluids . if despite of taking sufficient water you are still experiencing dark urine,check immediately with an Urologist since it could indicate a serious underlying health issue which could also warrant examination by a Cardiologist [microscopic hematuria] and Hematologist