The possible causes of stinging pain in the glans when urinating are: 1. Urethritis, congestion and edema of the urethral mucosa, erosion, and urine flowing through the relevant lesions of the mucosa during urination can produce stinging pain, which can radiate to the head of the glans. 2. Urethral calculi can cause continuous stinging pain in the urethra, and the pain can also radiate to the glans, mostly accompanied by dyspareunia or a sensation of foreign body in the urethra, sometimes there can also be symptoms of blood dripping from the urethra, urethroscopy is needed to confirm the diagnosis of stones. 3. Glansitis, there can be redness and swelling of the glans, and local exudation, mucosal The glans can be red and swollen, with localized oozing, mucosal damage, superficial ulcers, etc. Irritating pain can occur during urination, and physical examination can reveal signs of glans erosion. Bacterial or fungal smear tests are needed to clarify the diagnosis and give medication.