Female catheterization is a very simple operation. Because the female urethra is very short and shallow, the most important thing for catheterization is to be properly sterilized. First, put on gloves and lay a sterile towel, then choose a suitable catheter, expose the urethral orifice with one hand and slowly insert the catheter with the other hand, about 4 cm, and finally, after seeing the urine flow, attach the urine bag. If the bladder needs to be emptied, i.e., continuous drainage. The process of catheterization can be mildly uncomfortable and does not usually cause pain. If you are catheterized for urinary retention, do not drain more than 1000ml of urine at a time to prevent bladder bleeding.