8-year-old child urine blood is what causes

If children show the phenomenon of blood in urine, it may be related to these reasons: first, the urinary system is infected, the child's resistance is relatively poor, the urinary system is vulnerable to virus infection, in addition to showing symptoms of blood in urine, there are symptoms of urgency and frequent urination and pain in urine. Second, there may be acute nephritis, children in the cold, sometimes there will be blood in the urine phenomenon, this is because the cold bacteria caused by the immune system disorder, some bacteria with erosion to the kidneys, this time caused nephritis, showing blood in the urine. Third, the medication is unreasonable, children sick, short-term dosage is too large.