What is the reason why urine is yellow and smelly

Under normal circumstances, the urine excreted by the human body is very light yellow in color and transparent. This is a healthy urination phenomenon. However, busy work, study, and high stress will inevitably have side effects on our body's metabolism. For example, some of us find that under stress, our urine becomes yellow and smelly. So what is the reason why urine appears yellow and smells bad?

Freshly excreted urine has a special grassy aroma, but after being left for a long time, it develops an ammonia smell due to decomposition. What kind of situation is it if the urine is yellow and smelly? Experts say that if a urinary tract infection occurs, it may cause urine odor. Urinary tract infection has many factors, most of which are caused by unclean sexual life. Urinary tract infection can cause cystitis and suppurative pyelitis. At the same time, the possibility of urethritis cannot be ruled out for the cause of yellow and smelly urine.

1. Normal people's urine is light yellow. It is more clear when it is cold and more yellow when it is hot. This is related to sweating and how much water you drink, but it can also change with diet. If you consume an acidic diet, your urine will be dark in color, and if you consume an alkaline diet, your urine will be light in color. Sometimes, after taking a few riboflavin tablets orally, the urine will appear dark yellow. Changes in urine color like these are extremely short-lived and will quickly resolve on their own.

2. Yellowish-brown urine should be distinguished as bilirubinuria or urobilinuria. Bilirubinuria is often caused by blockage of the intrahepatic or extrahepatic bile duct by inflammation, tumors, or stones, which leads to increased bile duct pressure, bile duct rupture, and bile overflow, causing sodium bilirubin to enter the systemic circulation. When the amount of sodium bilirubin exceeds a certain level, bilirubinuria occurs. Urobilinogenuria is often caused by liver damage, which leads to increased intestinal absorption of urobilinogen, which enters the urine, resulting in urobilinogenuria. Or in patients with hemolytic anemia, after a large number of red blood cells are destroyed, a large amount of urobilinogen is absorbed through the intestinal wall into the portal vein circulation. Since the liver cannot convert the excess urobilinogen into bilirubin, urobilinogenuria also occurs.

Urologists teach you to initially judge the diseases you may have based on the smell of your urine:

1. Fecal odor: Patients with bladder and colon dysfunction often have fecal odor in their urine;

2. Apple scent: often seen in diabetic acidosis or hunger, this kind of urine can often attract ants to gather;

3. Corrupted and foul smell: common in cystitis and suppurative pyelitis;

4. Ammonia smell: It means that the urine has been broken down in the body and is a sign of cystitis or urinary retention.