Mild urethral strictures may cause the urine line to be thick and thin at times. Urethral strictures can be caused by trauma, infection, or medical factors. In the case of mild urethral stricture, it is often possible to urinate, but urination can lead to abnormalities, such as urine that is thick and thin at times, prolonged duration of urination, and symptoms of lower abdominal discomfort. If the urine is currently thick and thin, it may be due to mild urethral stenosis, but it may also be due to other causes, such as prostate enlargement, which often manifests itself in symptoms such as divergent urination, difficulty in urination, increased nocturia, frequent urination, and urinary urgency. Urine line thick and thin should be timely to the hospital, with the doctor to take the examination and treatment.