Urine color is very yellow and bad smell may be caused by drinking less water, may also be caused by infection. Urine can excrete the body’s metabolic wastes, normal urine is light yellow, if you drink less water, it will lead to urine concentration, the concentration of excreted waste products in the urine increases, which in turn leads to the yellow color of urine, and the taste is aggravated. This is a normal physiological phenomenon that does not require treatment and can be restored by increasing water intake. When there is a urinary tract infection, when the infection occurs after the urine can appear yellowish color, can also be manifested as brownish yellow or dark yellow, accompanied by urine odor heavier situation. Because the urine contains more pus cells, it smells bad, and the urine can be cloudy and unclear. Urine color is very yellow and bad smell may have other reasons, patients need to consult the examination, early treatment.