The symptoms of urethral stones are primarily related to the size and location of the stone. Smaller urethral stones generally do not cause discomfort and can be expelled from the body through urination. However, some urethral stones may cause pain within the urethra or even lead to the presence of blood in the urine. If the stone is large and lodges in the posterior urethra, it can cause complete obstruction of the urethra, leading to significant difficulty in urination, or even result in urinary retention. Therefore, the clinical manifestations of urethral stones vary depending on the size and location of the stone. If the stone is large and causes acute urinary infection or obstruction, leading to urinary retention, prompt surgical treatment is necessary.