A tingling sensation inside the urethra when going to the toilet is usually associated with urethritis, prostatitis, urinary stones and so on. 1. Urethritis: mainly due to gonococcal or non-gonococcal pathogens such as infection, often manifested as urethral stinging, urinary frequency, urinary urgency, urethral discharge and other symptoms. So a tingling sensation inside the urethra when going to the toilet is likely to be caused by urethritis. 2. Prostatitis: may be caused by pathogen infection, or with irregular sex life, sedentary, alcoholism and other factors related to the common symptoms are frequent urination, urinary urgency, urinary pain, fever, perineal discomfort, so it may also cause urethral stinging. 3. Urinary stones: such as urethral stones, bladder stones, can lead to urinary effort, interruption of urine flow and urinary retention, pain is obvious when urinating. There are also many other reasons for the stinging sensation inside the urethra when going to the toilet, such as urethral trauma, etc. It is recommended to consult a doctor in a timely manner, and to follow the doctor’s instructions for standardized treatment after clarifying the cause of the disease through scientific examination.