Men can not insert the urinary catheter at home by themselves, may cause damage to the urethra, but also easy to induce infection. Men can not insert a urinary catheter at home, because the male urethra is longer, and there are three physiological curvature, insert a urinary catheter by yourself, may cause damage to the urethra, will cause pain, swelling, bleeding, improper care is also prone to cause infections, induced urethritis and other diseases. Men who need to insert a urinary catheter should seek medical attention, and then the doctor to operate the insertion of urinary catheter, if there is serious urinary retention, after the insertion of the urinary catheter, do not one-time completely out of the bladder, but a small amount of urine several times, to avoid rapid emptying of the bladder after the damage caused. After insertion of the catheter, it is also necessary to do a good job of daily care, regular replacement, and to keep the catheter comfortable to avoid abnormalities.