The color of urine is normal, but blood in urine is++when urine is checked. What happened?

Normal color indicates that hematuria is not naked urine, but positive urine test, which proves hematuria under microscope.

Hematuria refers to the abnormal increase of red blood cell excretion in urine, which is a signal that there may be serious diseases in the urinary system. Hematuria is defined as abnormal increase of red blood cells in urine, centrifugal precipitation with urine field of vision ≥3 red blood cells per high magnification, or non-centrifugal urine exceeding 65,438+0 or 65,438+0 hours, urine red blood cell count exceeding 654,38+0 million, or urine sediment count exceeding 500,000 hours. In mild cases, only erythrocytosis is found under the microscope, which is called hematuria under the microscope; In severe cases, the appearance is watery or contains blood clots, which is called gross hematuria. Usually, when there is 1 ml of blood in every liter of urine, it can be seen by naked eyes, and the urine is red or has a meat washing water sample.

Factors that may lead to hematuria:

1, urinary system diseases

Such as nephritis (acute glomerulonephritis, viral nephritis, hereditary nephritis and henoch-schonlein purpura nephritis), calculus (kidney, bladder and urethra), cardiorenal tuberculosis, various congenital malformations, trauma and tumors.

2. Systemic diseases

Such as hemorrhagic diseases, leukemia, heart failure, septicemia, vitamins C and K.

Deficiency, hypercalciuria, neonatal symptoms, etc.

3. Physical and chemical factors

Such as food allergy, radiation exposure, drugs, poisons, after exercise, etc.

In order to clarify the cause and determine the location of hematuria, three cups of urine test can understand the source of hematuria, and the method is very simple.