Red urine in men

Many men have red urine. Normally, human urine is light yellow or transparent. When urine is red, it is likely hematuria. There are many reasons for this, including dietary reasons, pathological reasons such as urethritis, etc. In short, people need to pay special attention to it. Let's take a detailed look at why men have red urine.

Once the urine turns red, people think it is hematuria and become very nervous. In fact, red urine does not necessarily mean hematuria. In fact, there are many reasons that can cause red urine. The so-called hematuria refers to a state in which the red blood cells in the urine exceed a certain level. The reason why we emphasize "exceed a certain level" is mainly because red blood cells can also appear in the urine of healthy people. Hematuria can be divided into painful hematuria and painless hematuria according to the accompanying symptoms. Painless hematuria should attract more attention than painful hematuria because it is often an early signal of urinary system tumors.

Red urine does not necessarily mean hematuria. It can be seen in the following situations: Red urine caused by gonorrhea: After the urine is left or exposed to the sun, the urine is reddish brown or wine-colored, uniform and not turbid, with no red blood cells under microscopic examination, negative benzidine test, and positive urine porphyrogen test. It is seen in pyrrolidone metabolism disorder or lead poisoning.

Red urine is caused by contact with or oral administration of the following substances: red urine, no red blood cells in urine sediment microscopy, and negative benzidine test. There is often a history of medication or contact. For example: rifampicin, amitraz, santolin, sweet or rhubarb (in alkaline urine), as well as aniline dyes, anthocyanins, bile pigments, black berries, congo red, eosin, homogentisic acid, phenol peptide red, sulfonamide, sulfamethoxazole, etc. Hemoglobinuria or myoglobinuria: The urine is uniformly dark red or soy sauce-colored, de-aerated after shaking, and no red blood cells are found under microscopic examination. A positive benzidine test is often seen in diseases such as hemolytic anemia, erroneous blood transfusion, crush injury, large area burns, malaria, and rhabdomyolysis syndrome.