The change in the color of urine in the morning may be due to excessive concentration of urine, but there may also be disease, it is recommended to go to the hospital for relevant tests to clarify. 1, urine concentration, often manifested in the first few morning urine color is more yellow, and after drinking water, the urine can gradually return to normal color. In this case there are no conscious symptoms, often due to sleep at night without timely hydration or can not drink water, which leads to excessive concentration of urine in the bladder for too long, resulting in excessive concentration. This is not a disease condition and is a normal manifestation. The patient can drink more water before going to bed to prevent excessive concentration of urine, resulting in yellow urine color. 2, if there is a chronic infection of the urinary tract or jaundice disease, can cause yellow urine color in the morning, this situation can be mildly improved after drinking more water. However, yellow urine can also occur during other frequent urination during the day or symptoms of frequent urination, urinary urgency, and painful urination, which require urine related laboratory tests to further clarify the presence of infection or jaundice.