The main purpose of inserting a catheter in men is to be able to drain the urine out of the bladder in a timely manner to avoid storing too much urine in the bladder, which can cause great pressure on the patient’s bladder and also on the kidneys. Inserting a catheter requires some care, and it is recommended that this can be done in the following ways: first, it is necessary to make sure that the catheter is clear. If the catheter is not clear, it will not be able to play the proper role of the catheter. Secondly, it is recommended to keep the area around the catheter clean and hygienic, not wet, it is recommended to use iodophor to disinfect the catheter port and the area around the catheter every day to prevent inflammation and infection. In addition, it is recommended to drink more water and urinate regularly so that the urine can become clearer.