Painful urination is common in the following possibilities: the first is trauma, if there is a history of trauma, local urethral orifice mucosal ulceration, bleeding, there may be symptoms of painful urination. The second is infection, if there is a urinary tract infection will be combined with urinary tract irritation symptoms such as urinary frequency, urinary pain, urinary urgency. In addition, laboratory tests found that the white blood cells are significantly elevated, it is suspected that the lower urinary tract infection, there will be symptoms of urinary pain. The third is urinary stones, if the stone obstruction in the urethra will appear difficult to urinate, accompanied by symptoms of urinary pain, and even hematuria, through the imaging examination can be confirmed.