Possible causes of urine odor: First, urine concentration state can appear in the urine odor heavier, such as a long time without urination or less water, more sweating, more iron loss, etc. can cause urine concentration, or a long time to hold urine, urine in the bladder for more than 4 hours, can appear the phenomenon of odor more testy, appropriate more water, more urination, this situation can be improved; Second, if there is a long meat diet or high protein diet can cause urine acidic, resulting in the decomposition of trace protein, can produce a more tasty smell, Secondly, a long time meat diet or high protein diet can cause the urine to be acidic and increase the trace protein in the urine, resulting in the decomposition of the trace protein, which can produce a more tart odor, so you need to adjust the diet structure and drink more water. This is usually accompanied by frequent urination, urgent urination, painful urination or changes in the nature of urine, such as cloudy urine or an increase in flocculent or feathery sediment in urine.