The causes of pink urine may be: 1. kidney cancer, metastatic cell carcinoma of the renal pelvis, ureter and bladder may manifest as intermittent, painless carnal hematuria. 2. infectious diseases, such as acute cystitis and acute pyelonephritis. 3. urinary stones, such as ureteral stones and bladder stones after extracorporeal lithotripsy treatment. 4. transurethral operations, such as indwelling catheters, cystoscopy, transurethral surgical operations. 5. 5. traumatic factors, such as abdominal crush injury, kidney contusion, straddling injury. 6. hemolysis, blood disorders, coagulation dysfunction, nephrotic syndrome, and some medical diseases such as glomerulonephritis. 7. taking some special drugs and eating some special foods, such as rifampin and red heart dragon fruit.