The blood in the urine is a little painful, considering that it may be caused by physiological reasons, urinary tract infections, urinary stones, urinary tract tumors and so on.
1. Physiological reasons: when exercise is excessive, the blood flow of the kidneys is reduced ischemia, which will lead to glomerular filtration rate is impaired, part of the red blood cells into the urine resulting in blood in the urine, and may be accompanied by a slight pain.
2. Urinary tract infections: most common in urethritis, cystitis, men may be prostatitis, mainly due to long-term inflammation stimulation, resulting in urethral wall or bladder mucosa congestion and swelling, sometimes there will be hematuria phenomenon.
3. Urinary stones: such as ureteral stones, bladder stones, urethral stones, mainly due to the stone activity will stimulate the ureteral wall, bladder wall or urethral mucosa, which causes bleeding.
4. Urological tumors: for example, kidney tumors, often appear painless hematuria.
Blood in the urine with a little pain may also be caused by other reasons, it is recommended to go to the hospital in a timely manner to identify the causes of targeted treatment.