Difficulty urinating at night and normal during the day may be caused by urinary tract infection, prostate enlargement, urethritis, etc. Patients should immediately go to the hospital to find out the cause of the disease and be treated under the guidance of the doctor. 1. urinary tract infection: urinary tract infection is the inflammatory response of the urinary tract epithelium to bacterial invasion, usually due to personal hygiene, urinary tract stones and other causes of infection, the patient usually occurs frequent urination, urinary urgency, nausea, vomiting and other symptoms. 2. Prostatic hyperplasia: Prostatic hyperplasia generally refers to a change in the balance of hormones, so that the prostate gland hypertrophy, may be due to the patient’s poor dietary habits and unstable emotions and other reasons for the patient, the patient will usually have frequent urination, urinary urgency, urinary difficulty symptoms. 3. Urethritis: Urethritis generally refers to inflammation of the mucous membrane of the urethra, usually due to urethral injury, urethral foreign body and other reasons, may appear frequent urination, painful urination, urinary urgency and other symptoms. It may also be caused by drinking more water before going to bed and holding urine. It is recommended that patients go to the hospital in time for reasonable treatment under the guidance of the doctor.