14-year-old boy urine blood is what causes

14-year-old boy urine blood causes may include urethritis, bladder stones, nephritis, etc., the specific analysis is as follows:

1. urethritis

if the boy has urethritis, so that inflammatory reaction stimulates urethral mucosa, leading to urethral mucosa damage, bleeding, blood and urine mixed discharge, performance for urine blood.

2. bladder stones

if the boy bladder stone activity is good, may stimulate the bladder mucosa, bladder mucosa damage, causing urine blood.

3. nephritis

due to the boy's inflammatory reaction stimulates the kidney mucosa, so that the blood vessels under the kidney mucosa damage, causing bleeding, and then blood and urine together discharged from the body, urine blood.