Uric acid crystals and blood in the urine are called hematuria. Hematuria may be caused by small stones formed by urate crystals that rub against the mucosa of the renal pelvis and ureter. When the small crystals move downward from the kidney to the ureter, they cause the mucous membrane to rub and bleed, and the rubbing and bleeding manifests as blood in the urine. It is recommended that this condition must drink a lot of water and urinate more, which can dilute the concentration of crystalline substances in the urine thus forming more urine, and also promote the discharge of urine salt crystals out of the body, and also flush the blood to prevent it from becoming a blood clot. It is also recommended that you can take appropriate oral anti-inflammatory drugs, mainly to prevent the occurrence of inflammation and further aggravation of the condition.