How the treatment and prevention of kidney disease

The 17-year-old male student, urine into the tea leaves, after examination was normal. Symptoms still, some time after discharge urine mixed with Scarlet. Checked normal. Was very anxious not find the cause, is Shabing
How do want to help: thank the doctors for my quick answer - how the treatment and prevention
Doctor: Hello: 1, patients now whether the medication. 2 hospitalized disease is it? Do check? Check the results confirm whether accurate?