Red urine represents the possibility of hematuria, which is usually caused by kidney disease, urinary tract disease, and systemic disease.
1. Kidney diseases
(1) Various primary glomerular diseases: acute and chronic glomerulonephritis, IgA nephropathy and so on.
(2) Infection: renal tuberculosis, pyelonephritis.
(3) Malformations: renal vascular malformation, wandering kidney, renal prolapse, hydronephrosis, etc.
(4) Tumor: renal embryonic tumor, renal calyceal vascular tumor, etc.
(5) Renal vascular lesions: renal vein thrombosis, nutcracker phenomenon.
(6) Injury: renal contusion and other injuries.
(7) Drugs: nephrotoxic drugs, such as aminoglycoside antibiotics, cyclophosphamide, etc., can cause renal damage and hematuria.
2. Urinary tract diseases
(1) Infection: cystitis, urethritis, tuberculosis.
(2) Stones: ureteral stones, bladder stones.
(3) Tumor, polyp, diverticulum, foreign body.
3. Systemic diseases
(1) Bleeding disorders: disseminated intravascular coagulation, hemophilia, leukemia, etc.
(2) Cardiovascular diseases: congestive heart failure, infective endocarditis.
(3) Infectious diseases: scarlet fever, epidemic hemorrhagic fever, hepatitis virus.
(4) Systemic diseases: systemic lupus erythematosus, anaphylactic purpura.
(5) Nutritional diseases: vitamin K deficiency.
(6) Other diseases: such as hereditary capillary dilatation, transient hematuria caused by strenuous exercise.
There are many reasons for the discharge of red urine, it may also be physiological reasons, or women’s menstrual blood contamination, etc., should be timely consultation and treatment.