Urine can be used to replace the body to excrete a variety of toxins, urine has a fishy smell for the following reasons: 1, diet: may be related to diet, urine has a fishy smell does not necessarily mean that there is a disease. If long-term urine odor, it is recommended to go to the hospital to do a routine urine examination to determine whether there are abnormalities in the urine; 2, inflammation: if the examination of white blood cells increased, urine has a fishy smell, indicating that the body has inflammation; 3, tumors or stones: if the urine has more red blood cells, consider urinary system diseases, you need to do urinary ultrasound to exclude the possibility of tumors or stones; 4, diabetic ketoacidosis: if the urine smells like rotten apples If the urine smells like rotten apples, consider diabetic ketoacidosis. The fishy smell of urine alone does not mean that there is a disease. You can drink a lot of water every day, try to eat less stimulating food and observe the urine. If the patient is really unsure, it is recommended to go to the hospital to do urological ultrasound and urinary routine, if there is no abnormality, it represents a problem with eating habits.