Why is urine sometimes particularly yellow?

Why sometimes urine is particularly yellow. In urine, because of the presence of urobilinogen, urine also presents a certain yellow color. Under normal circumstances, urine is pale yellow, if you drink less water, especially morning urine, the color is darker yellow. This is because after a night of urine contraction, the concentration of some substances in urine increases, so the yellow color of urine deepens. This is a normal physiological phenomenon, and there is no need to worry. If the urine often shows dark yellow, you need to do the next related examination. First do a urine routine test to see if there is any abnormality. If the urine routine test is urobilinogen positive, you need to enter the liver function and liver B ultrasound examination to understand whether there is liver damage and hemolysis in the body.