Stinging after urinating in the lower body, this is caused by inflammation in the urethra, that is, a bacterial infection. The most common infection bacteria, may be Escherichia coli, staphylococcus, gonococcus, etc.. It is recommended that you must pay attention to hygiene and wash your lower body and urethra, clean and dry every day. You should drink more water, urinate more often, drink more than 1,500 ml of water, have a urine test, observe the situation of white blood cells in the urine, and take oral broad-spectrum antibacterial agents. The antimicrobials recommended are roxithromycin, doxycycline, clarithromycin, and levofloxacin, cefdinir, etc. The majority of symptoms will be significantly relieved by taking these drugs for 2-3 days.