THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -When you have not drank enough fluids your kidneys try to save as much water as they can and cause your urine to be darker in colour (more concentrated). Dark yellow urine is a sign that you are dehydrated and that you must drink more fluids to prevent dehydration.

Detailed explanation-2: -During whole-body dehydration, urochrome concentration increases as antidiuresis is stimulated via increased arginine vasopressin production, thus increasing water reabsorption from the collecting duct of the nephron. This physiological response to dehydration results in darker and more concentrated urine (3, 4).

Detailed explanation-3: -Dark Urine as a Sign of Dehydration If your urine is a moderately dark shade of yellow, you are becoming dehydrated and should drink some water soon. Very dark yellow, amber or orange urine means you are severely dehydrated and that you need to take in some fluids quickly.

Detailed explanation-4: -Some liver and kidney disorders and some urinary tract infections can turn urine dark brown. So can bleeding inside the body called a hemorrhage. A group of illnesses that mainly affect the skin or the nervous system, called porphyria, also can cause brown urine.