Yellow urine and yellow semen may be caused by physiological factors, but also by liver and gallbladder diseases, inflammation and other factors. 1. Simple yellowing of urine: simple yellowing of urine color is mostly caused by sweating and drinking less water, resulting in concentration of urine, which can be improved by drinking more water. It can also be caused by hepatobiliary diseases, such as obstructive jaundice. 2. simple semen yellow: semen color yellow need to consider the reproductive system inflammation, such as seminal vesiculitis, prostatitis; or due to a long time without ejaculation semen concentration. 3. urine and semen at the same time yellow: this situation should be considered recently ate with pigmented food or drugs, such as yellow pigment, B vitamins lead to. Overall, semen, urine yellow color can not be relieved to pay attention to, it is recommended that patients go to the hospital in a timely manner to check, clear reasons for targeted treatment.