Yellow urine is often associated with a variety of factors, as follows: 1, the first urine in the morning is the thickest in the day, so it is more common to get up in the morning and yellow urine, the key is to what degree of yellow, there are no other problems; generally encounter similar situations, it is recommended that the patient first to do a routine examination of the urine; 2, related to food and medication, if you eat a yellow medication, the urine will also be more yellow, especially at night to take, and get up in the morning will be more yellow. Some edible dyes or fruits, such as mango, will cause changes in urine; 3. If all the tests are normal and the urine is still yellower, it means drinking less water. It is recommended to drink 1500-2000mL of water per day in normal life, and even more for some people. Adequate drinking water can ensure sufficient urine, can bring out the human body toxins, excreta, can reduce the toxic material invasion.