Catheter leakage may be caused by problems with the quality of the catheter, a folded or blocked catheter, and bladder spasms. 1. Problems with poor quality of the catheter: If there are problems with the quality of the catheter, urine leakage may occur. 2. Folded or blocked catheter: If the catheter is folded or if there is sediment in the urine it can cause the catheter to become blocked and the urine will not drain easily. This can lead to an increase in bladder pressure, which can lead to catheter leakage. 3. Bladder spasm: catheter inserted into the bladder may stimulate the bladder mucosa, if the patient’s bladder is too sensitive, or due to urinary tract infections and other reasons may stimulate involuntary contraction of the bladder detrusor muscle, which makes the patient’s bladder pressure increases, the patient will also appear catheter leakage performance. Patients with symptoms of urinary leakage after insertion of catheter are advised to seek prompt medical attention, and the doctor will choose the appropriate way to deal with the cause of urinary leakage.