Inability to urinate after catheter removal may be related to weak contraction of the forced urinary muscle, untreated primary disease, and urinary tract infection. 1. Weakness of forced urinary muscle contraction: due to long-term indwelling catheter, the bladder forced urinary muscle contraction is weak. After the catheter is removed, the bladder forced urinary muscle contraction force is insufficient, and the patient feels that it is difficult to urinate or even unable to urinate. 2. Untreated primary disease: If the catheter is needed for other reasons, such as the patient himself has prostate hyperplasia, and relevant treatment is not given, the patient will also be unable to urinate. 3. Urethral infection: when the urinary catheter is left in place, it is combined with a urinary tract infection, and after the catheter is removed, due to the presence of blood and edema in the urethral mucosa. This leads to an increase in resistance in the urethra and pain in urination, causing patients to be afraid to urinate. After pulling out the catheter urine can also be seen in other reasons, it is recommended to timely consult a doctor, follow the doctor’s instructions for relevant examinations, in the doctor’s help to deal with or treatment.