For girls with stabbing pain and blood in urine, it is recommended to drink more water, pay attention to perineal hygiene and take anti-inflammatory drugs. In this case, it is a typical female urinary tract infection. It is recommended to drink more than 1500ml of water per day to effectively promote the excretion of inflammation and effectively relieve the symptoms. Oral antimicrobials are recommended, either oral cephalosporins or oral quinolone antimicrobials. Levofloxacin 0.2 grams twice a day orally for 5-7 days is generally recommended. Sodium bicarbonate can also be taken orally, 0.5 grams each time, 3 times a day, it has the function of alkalizing the urine and relieving the stinging pain in the urethra. You can also take Chinese patent medicines orally, such as Heat Shower Qing and San Jin Tablet, which have the function of clearing heat and detoxifying.