Is yellow urine a sign of getting angry?

“You can tolerate feces, but not urine”, although it is a joke, it is not without reason. As one of the three urgent things in life, we have to “pee” three, four, five, six, seven or eight times a day. But have you ever really cared about the content separated from your body? Some people really care about their urine and think that they can analyze their health status by observing its state. The most common saying is “It’s a little yellow recently, it seems that I’m getting angry!” Does this statement make sense?

It’s no wonder that there is a close connection between the color of urine and our physical health!

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01

"Wastewater" filtered out by the kidneys

That's what we call "pee"

The kidney is the "filter" of the human body. The blood of the human body flows through the kidney for filtration every day, and through this link, the metabolic waste in the blood is discharged from the body. Under normal circumstances, the glomerulus filters out 180L of water every day, which we call "primary urine", but 99% of this primary urine will be reabsorbed by the renal tubules, and the remaining 1%, which is about 1.8L, can be discharged from the body, called "final urine", which is our urine, or "urine".

The main component of urine is water, followed by various metabolic wastes of the human body, metabolic components of drugs, etc. We all know that water must be colorless and transparent, and the color of urine mainly depends on the content of various metabolic substances in it.

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02

Urine color and shade

It is the "barometer" of physical health

Normal fresh urine is a transparent, amber liquid. The color of urine can be dark or light depending on the amount of urine. The depth of urine is directly related to our physical health. It can be said that "one can know the whole body by looking at the color of urine."

1. Clear as water

If the urine is very light in color, or even as clear as tap water, it means that you drink a lot of water, produce a lot of urine, and the components in the urine are diluted. Generally speaking, this is a normal phenomenon, and nephrologists also hope that everyone will drink more water and urinate more. First, it can dilute the concentration of calcium oxalate and uric acid to prevent the formation of kidney stones; second, it can dilute the retention time of drug metabolites in the kidneys and reduce the damage of drugs to the kidneys; and the continuous flushing of urine can also prevent urinary tract infections.

2. Transparent light yellow

This indicates that the kidneys are normal, the body is healthy, and the amount of water consumed is moderate.

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3. Dark yellow urine

The yellow color of urine is because it contains a very small amount of bilirubin. In patients with certain liver and gallbladder diseases, such as acute and chronic hepatitis, gallstones, cholecystitis, and pancreatic cancer compressing the bile duct and causing bile duct obstruction, the bilirubin in the blood will increase significantly, and when it is excreted into the urine, it will cause the urine to be dark yellow.

4. Red urine

The most common condition is hematuria. Kidney diseases such as IgA nephropathy, damage to the glomerular filtration membrane, and red blood cells in the blood will leak into the urine, resulting in hematuria. Extrarenal diseases such as ureteral stones, stones that scratch the ureteral mucosa, or severe urinary tract infection mucosal damage and bleeding can also cause hematuria.

In mild hematuria, the urine is light red, similar to the color of meat washing water. In severe hematuria, the urine is red, and even blood clots can be seen.

In addition, urine may turn red after eating certain foods (such as beets) or taking certain medications (such as rifampicin, aminopyrine, etc.), but this is not hematuria.

Everyone should pay attention. If you encounter red urine, you must go to the hospital for a routine urine test and urine sediment microscopy examination. Do not be careless.

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5. Increased foam in urine

Some people may find that their urine has a lot of foam, which means that the urine contains a lot of organic components such as protein, sugar, bilirubin, inflammatory secretions, etc. The surface tension of urine increases, and foam will appear in the urine when urinating. In severe cases, it will be similar to the degree of hops when pouring beer. This situation is mostly caused by glomerulonephritis, diabetic nephropathy, increased bilirubin, urinary tract infection, etc. In addition, in some cases, drinking less water and concentrated urine will also cause foamy urine.

Although the above-mentioned diseases can cause foamy urine, it does not necessarily mean that there is something wrong with your body. You also need to go to the hospital for a urine test to make a diagnosis.

6. Brown urine

Some people find that their urine is the color of strong tea, or even soy sauce or cola. This is common in cases of muscle lysis caused by excessive fitness, strenuous exercise, muscle crush injury, etc. Myoglobin leaks into the urine when muscle fibers are damaged, forming this series of colors. In addition, hemoglobinuria caused by massive hemolysis is also this color.

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03

Urine color depth

Is it related to getting angry?

What we call "getting angry" is just a folk saying. It is difficult for modern medicine to give an accurate explanation of what "getting angry" means. For the time being, we understand it as an infection. Inflammation and decomposition metabolism increase, and the content of metabolic waste in urine increases, which may cause the urine to become darker. Drinking more water and urinating more often can relieve "getting angry" and make the urine lighter.

As for the pH of urine, there is actually a rough range. Generally speaking, normal urine is neutral to slightly acidic, with a pH between 5.5 and 7.0. Metabolic waste in urine is acidic. If there is too much metabolic waste, or if you drink less water and your urine is concentrated, the content of metabolic waste in urine will increase, and the urine will be more acidic.

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You can see that our "pee" carries a lot of biological information. Urine tests can not only detect kidney disease at an early stage, but also detect medication use. Urine tests in sports competitions are based on this principle. In addition, modern medicine can also analyze trace components in urine to detect diseases such as tumors at an early stage.

In short, the color of urine is an alarm for physical health, and urine testing is non-invasive, cheap, and convenient. Regularly observing the color of urine and performing regular urine tests can help detect many diseases early.

Author: Li Qing Tianjin University TEDA Hospital

Review | Yu Yusheng Chief Physician, Department of Nephrology, General Hospital of Eastern Theater Command of PLA

This article is produced by the "Science Rumor Refutation Platform" (ID: Science_Facts). Please indicate the source when reprinting.

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