What causes yellow urine and foam?

The reasons for yellow urine and foam are as follows: First, drinking less water or being in a high temperature environment for a long time, causing a large loss of water in the body through sweat, so urine production is relatively reduced, urine will be more yellow, when urinating, urine falls from a height, will show transient foam urine. This kind of foam urine generally will urine stand for 10 to 20 minutes, foam will disappear on its own, this kind of foam urine belongs to the normal phenomenon, generally yellow urine can be diluted by drinking more water. Second, if the patient has kidney disease, such as glomerulonephritis, nephrotic syndrome, when urinating, urine will also show foam urine, and there may be a decrease in urine volume, resulting in yellow urine, this situation urine routine general albumin will be elevated, need to actively look for the cause, and then for the cause of treatment.