Postpartum painful urination is usually related to urinary infection, and the causes of postpartum painful urination vary according to different delivery methods.1. Natural vaginal delivery: the female urethra is located near the vagina and has the characteristics of short, straight and wide, which is susceptible to retrograde invasion of bacteria, so postpartum painful urination is mostly considered as urinary system infection. Due to the discharge of postpartum dew, it is easy to lead to bacterial infection, resulting in frequent urination, urgent urination, painful urination, incomplete urination, etc. Routine urine examination and bacterial culture are needed, and if the values of white blood cells, bacteria and nitrite are elevated, or there is a specific bacterial infection, timely treatment is needed; 2, cesarean delivery: painful urination after cesarean delivery is mainly due to the insertion of urinary catheters before surgery, resulting in Slight injury and edema, or improper postpartum care resulting in local inflammatory infection, causing pain. Considering the puerperium and breastfeeding situation, in terms of treatment, if the symptoms are mild and tolerable, patients are advised to drink water for treatment. Drinking a lot of water can bring bacteria out of the urethra with urine and reduce the inflammatory reaction, and the symptoms will be significantly reduced after 24 hours. If the infection is more serious, antibiotic treatment is required under the guidance of a doctor, generally using cephalosporins. If the symptoms are not relieved within 24 hours of taking the medication, the patient will need to be hospitalized for infusion treatment. During the period of medication, the mother should stop breastfeeding, eat as lightly as possible, and pay attention to vulva hygiene and change underwear regularly.